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I'm not fully sure what happened with these, I think I was just rushing and ended up circling the wrong ones.

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Arrange the following elements in order of decreasing nuclear charge.
C ,  Cu ,  S ,  P

a) S > P > C > Cu
b) C > S > P > Cu
c) C > P > S > Cu
d) Cu > P > S > C

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I most likely missed these questions due to not being fully clear on the topic and still not understanding some aspects of it.

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How does nuclear charge change when moving across an energy level?

As you move across an energy level from left to right, the nuclear charge becomes stronger. This is due to the increasing number of protons.m

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Why does S have a greater nuclear charge when compared to BR.

S is smaller when compared to Br, so that means it's electrons are closer towards the nucleus than Br's are. So the Nuclear charge for S is larger than that of BR.

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Which of the following has the greatest effective nuclear charge?
A.) Db
B.) Sg
C.) Ru
D.) P

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Explain why F has a greater nuclear charge than O. F has a greater nuclear charge than O because it has more valence electrons and a greater number of protons, which causes the nuclear charge to increase.

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It honestly comes down to me overthinking things and writing down more than I need to, which means that what I write down is probably wrong.

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Explain why Cl has a greater nuclear charge than S.
Cl has one more proton than S, meaning it's charge is one greater than S. This means that Cl has a greater pull on electrons.

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Which of the following elements has the greatest effective nuclear charge?
A) W
B) Fe
C) O
D) Rn

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I tend to skim over the questions, which may have resulted in a misunderstanding.

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Out of the elements Cl and S, which has a smaller effective nuclear charge and why?

S has a smaller effective nuclear charge. There are less protons in that element than in Cl, meaning there is a weaker pull and the effective nuclear charge is less.

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Which of the following atoms has the greatest nuclear charge?

a) W
b) N
c) Y
d) F

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I think I know nuclear charge fairly well but the problem is that I get it confused with electrostatic attraction as well as ionization energy (because they are going in the same direction for their trends).

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Why I missed these questions (Kayla Stissel

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Why I missed these questions (Kayla Stissel

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I missed these questions because I wasn't fully looking at all the answer choices and narrowing them down as well as I should have

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I missed these questions because I got confused on effective nuclear charge and the effects is has on electrons.

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List the following elements in order of INCREASING effective nuclear charge. (F, Re, La, S)

La<Re<S<F

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I rushed through these questions thinking I knew the answer.

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Explain why Potassium has a lower effective nuclear charge than Bromine?

Answer: Bromine possesses a higher effective nuclear charge due to a great pull from the nucleus as a result of a greater number of protons in Bromine than in Potassium. Due to more protons, the attraction is greater, resulting in a greater effective nuclear charge.

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I missed these because I got confused of how to compare different elements with different energy levels.

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Why I missed these questions - James Voos

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Why I missed these questions - James Voos

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I knew exactly what Effective Nuclear Charge was but I lacked evidence to support my claims.

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Which of the following elements possesses the greatest effective nuclear charge?
A. Fe
B. F
C. Bi
D. Ge
Correct Answer:

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Does C or Sn have a greater effective nuclear charge?

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Does C or Sn have a greater effective nuclear charge?

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How does nuclear charge relate to the atomic radius of an atom?
The higher the nuclear charge, the smaller the atomic radius.

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Does nuclear charge increase or decrease from right to left in a period? Why? Nuclear charge decreases in this case because the amount of protons in the nucleus decrease.

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Why does Carbon have a higher effective nuclear charge than Lithium?  Carbon has a higher effective nuclear charge due to its greater pull form the nucleus.  This is caused by a greater number of protons and electrons in Carbon without it having more shells to create more shielding.

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I used the term in the wrong context.

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Which element has a higher effective nuclear charge?
A. Carbon
B. Aluminum
C. Titanium
D. Francium

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As you move from right to left on the periodic table, will the nuclear charge increase or decrease?

The nuclear charge would decrease, because as you move right to left, the elements are losing protons.

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I knew the answer I just didn't know how to explain it.

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Between the elements Ge and Sr, which has the higher effective nuclear charge?

A. Sr, it has more protons than Ge
B. Ge, it has more valence electrons
C. Sr, it has more energy levels
D. Ge, it has more protons than Sr

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Which element out of Al and F has the greater nuclear charge?
a. F, Fluorine has more protons than O
b. F, Fluorine has less protons than O
c. O, Oxygen has more protons than F
d. O, Oxygen has less protons than F

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Why I missed these questions- Ashley Armendariz

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Why I missed these questions- Ashley Armendariz

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I made careless mistakes and forgot which way the nuclear charge increased/decreased on the periodic table.

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Arrange the following elements in order of decreasing nuclear charge.
P, C, Al, Li

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The way some questions were worded kind of confused me so I missed key words.

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I missed these because I didn’t think the questions through.

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Why does F have a higher nuclear charge than V?
Answer: Because as you move from the left to the right, the amount of protons increase.  Thus creating a higher nuclear charge.
(Hope McNish)

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Which of the following has a smaller nuclear charge?

a. Ac

b. Zn

c. Au

d. F
(Hope McNish)

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Describe the reason why the first ionization energy of aluminum is greater than that of calcium.

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Multiple Choice: Which choice is in order of least to greatest effective nuclear charge?

A. Be<Mn<N

B. N<Mn<Be

C. Na<He<Fe

D. Fe<He<Na

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Mackenzie Reed- Why I missed these questions.

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Mackenzie Reed- Why I missed these questions.

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Skipping certain steps led to careless mistakes on my part.

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Why does Cobalt have a lower Nuclear Charge than Arsenic? Arsenic has a higher Nuclear Charge because there are more protons pulling the electrons together which will make the electron cloud bigger because of electron repulsions.

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Which of the following has the smallest nuclear charge?
A: Ca
B: F
C: Ar
D: O

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Which element has the highest nuclear charge?
A.Ir
B.Cl
C.O
D.Se

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I missed these questions because of careless mistakes.

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Why would Chlorine have a smaller nuclear charge than Argon?

A: Chlorine has a smaller amount of protons in it's nucleus than Argon, which would make it's nuclear charge smaller.

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Why I got these questions wrong - Richard Whitfield

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Why I got these questions wrong - Richard Whitfield

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I made the mistake of not writing out the up/down arrows for different atoms. It led to dumb mistakes.

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Explain how effective nuclear charge relates to proton number by energy levels.
The atom with the greatest number of protons on an energy level will have the greatest effective nuclear charge. The greater number of protons provides a greater pull on the electrons.

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I forgot to distinguish in which direction the nuclear charge will increase.

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As you gain more protons will nuclear charge increase or decrease and why?

It will increase. Because you have more protons it effects the electrons more and they'll be pulled in with more force.

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Reasons for missing this question- Jenna Trantham

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Reasons for missing this question- Jenna Trantham

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Make sure you remember that nuclear charge increases as protons increase.

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Why would Oxygen have a greater nuclear charge than Boron?

Answer: Oxygen has more protons in it's nucleus therefore it would have a greater nuclear charge.

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I missed this simply because I wasn't paying attention to what the question was asking for.

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How does effective nuclear charge relate to ionization energy?
Nuclear charge increases with ionization energy because the harder it is to remove the electrons the greater the effective nuclear charge is.

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Explain why Niobium has a lower effective nuclear charge than Germanium.
Niobium has a lower nuclear charge because germanium has a higher electrostatic attraction.

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Explain, in terms of atomic structure, why As has a higher first ionization energy than Ga.

Answer: (As) has a higher nuclear charge because it has a smaller atomic radius, therefore increasing the electrostatic attraction.

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Which of the following has a higher Nuclear Charge?
A) Ag
B) La
C) Ga
D) Cl

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Which of the following has the greatest effective nuclear charge and why?
Cl, it is closer to the noble gasses on the table.
K, because it has a positively charged ion whereas in Cl it is negative.
Cl, It has less energy levels
K, because it has more valence electrons.

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Why I missed these questions. -Savannah Amick

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Why I missed these questions. -Savannah Amick

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I understand these questions however I missed them because made stupid mistakes.

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Why Did I Get These Questions Wrong? (Chloe Russell)

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Why Did I Get These Questions Wrong? (Chloe Russell)

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I second guessed myself and I wasn't sure about my answers.

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I missed these questions because I got confused about if the nuclear charge changes as you go down a column.

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Which has the highest first ionization level?
a. F
b. Na
c. Fe
d. C

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Explain why the nuclear charge of an atom increases as you travel from left to right on the periodic table.

Answer: The nuclear charge increases as you travel from left to right on the periodic table because more protons are being added into the nucleus, which is how you measure nuclear charge.

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Why I missed the questions Ell Henderson

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Why I missed the questions Ell Henderson

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I missed one isoelectronic charges because I didn't know you just had to compare the charge.

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Which of the following has the greatest ionization energy?

A.) C
B.) O
C.) Ne
D.) H

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Why I missed these questions (Nick Oberlin)

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Why I missed these questions (Nick Oberlin)

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I missed these questions because I completely forgot about the periodic trends.

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If elements P+1 and Cl-1 are isoelectric with each other which one has a greater nuclear charge, and why? Answer: Cl-1 has a greater nuclear charge because it has more protons creating a stronger effective nuclear charge.

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I think I had these in the bag for the most part. Maybe careless mistakes here and there but if I had my mind straight I would of got them right.

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Does Phosphorus (P) have a greater or lesser nuclear charge than Argon (Ar)?
Phosphorus has a smaller nuclear charge because Argon has more protons pulling the electrons closer to the nucleus, therefore increasing the effective nuclear charge.

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Which of the following atoms has the greatest nuclear charge?

a. Cl
b. As
c. Be
d. Ca

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I don't remember if I missed any of these specifically but I could see myself messing up the periodic trend. I wish there was an easier way to remember it.

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Why I missed these Questions (Maggie Schall)

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Why I missed these Questions (Maggie Schall)

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I missed these questions because I would think about the wrong trend. I would include/exclude the noble gasses when I shouldn't and overall just got a bit confused.

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Which has the highest first ionization energy?

A. K
B. O
C. F
D. Ag

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Explain why Cl has a higher effective nuclear charge compared to P. Cl has more protons than that P does allowing for a greater pull towards the nucleus.

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Question: Which has a larger atomic radius, K or As, and explain why.

Answer: K would have a larger atomic radius. This is because As has a larger nuclear charge, created by having more protons in the nucleus, which causes the electrons to be pulled closer to the core of the atom.

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I missed these questions because I am dumb

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Which of these elements has the greatest nuclear charge?

a. Xenon
b.Bromine
c. Gold
d. Nitrogen

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As and Br are in the same energy level, what differentiates them and makes one larger than the other?

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Why I missed these questions Natalia Wilson

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Why I missed these questions Natalia Wilson

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I missed these questions because I misread questions and interrupted them incorrectly.

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Which of the following elements has the highest effective nuclear charge?
A.) K
B.) Mn
C.) Zr
D.) S

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Explain why Mg has a smaller nuclear charge then Al.
Mg has a smaller nuclear charge then Al because Al has more more protons then Mg causing a greater pull on the electrons.

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Which element has the greatest nuclear charge?
A) Li
B) Be
C) Al
D) S

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Why I missed these questions (Victoria Contreras)

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Why I missed these questions (Victoria Contreras)

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I miss these questions because when they are close together on the periodic table but in different periods and groups I get confused.

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Which of the following elements has the lowest effective nuclear charge
A Sr
B N
C Se
D Br

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Which has a larger atomic radius, Be or C and why?
Be has a larger atomic radius due to the fact that is has a smaller effective nuclear charge causing the electrons to not be as attracted to the nucleus therefore increasing their distance from the nucleus.

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Which of these elements has a greater nuclear charge
A) Cs
B) O
C) Ag
D) Cr

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Explain the reason why the first ionization energy  of Nitrogen is higher than that of Carbon?
Nitrogen has a greater effective nuclear charge than Oxygen, it having more protons in the nucleus than Carbon and closer to becoming a noble gas.

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Which has a greater nuclear charge?
A) Al
B) Si
C) P
D) S

Written Response:
When elements are in the same energy level, why is the nucleur charge different?

The nuclear charge is different because the element with the most protons has the biggest nuclear charge.

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Which has a higher first ionization energy, F or Ne?

Ne, because it has a greater effective nuclear charge due to its greater amount of protons in the nucleus.

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Which of the following elements has the highest effective nuclear charge?

A. F
B. Ag
C. Ca
D. Mn

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Why I missed these questions (Adira Abdullah)

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Why I missed these questions (Adira Abdullah)

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I actually understood these questions really well, but I might have missed them due to careless mistakes.

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Which element has the highest effective nuclear charge?
a. Sn
b. As
c. P
d. Al

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Explain why Magnesium(Mg) has a greater effective nuclear charge than Sodium(Na).

answer: Mg has more protons than Na, increasing the electrostatic attraction.

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Why I got these questions wrong. Colby Dennis

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Why I got these questions wrong. Colby Dennis

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I got these questions wrong because I forgot when to use nuclear charge.

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Element X and Element Y are in the same period on the periodic table. Element X has a larger effective nuclear charge than Element Y. Which element is larger and why?

a. Element X because it has more energy levels

b. Element Y because it has more energy levels

c. Element X because it has less protons

d. Element Y because it has less protons

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Why would Sulfur have a stronger nuclear charge then Aluminum?  Sulfur would have a stronger nuclear charge because it has more protons in its nucleus causing a stronger pull or attraction to the nucleus from the electrons. This also causes sulfur to become smaller in size.

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Why does F have a greater nuclear charge than Co?

F has a greater nuclear charge than Co because it only has two energy levels compared to Co having 4 energy levels.

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Using your knowledge of Effective Nuclear Charge, explain why Br has a greater first Ionization Energy than Se.

Br has a higher atomic number, which causes a greater nuclear charge, than Se. This results in a stronger pull on the Valance Electrons, causing a greater 1st Ionization Energy in Br.

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Free Response: Why does Br have a greater nuclear charge than Se?
Multiple Choice: