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I most likely missed these questions due to careless mistakes.

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When creating an ion of an element, where would be easiest to add/remove electrons?

The highest energy level (outermost shell).

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Which of the following is an electron configuration in the excited state?

a) 1s² 2s² 2p⁶
b) 1s² 2s² 2p6 3s¹
c) 1s ² 2s ² 2p 5 3s ¹
d) 1s² 2s² 2p6 3s² 3p⁴

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Explain the difference between the 3 and 7 energy levels? The difference between the two is the amount of orbitals that are in each energy level. In the 3rd, there are three. However, in the 7th, there are 7.

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Why does Rb have a bigger atomic radius than Li? Because Rb has more energy levels making the atom bigger and further away from the nucleus.
How many valence electrons can be in the 4th energy level? D
A) 2
B) 4
C) 6
D) 18

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I'm really scratching my head on this one, as I know this topic really well. I guess I just wasn't focused and thought about it in the wrong way.

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Write the electron configuration for Br.
1s2 2s2 2p6 3s2 3p6 4s2 4p5

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Which of the following elements is in the 4th energy sublevel?
A) Ne
B) Br
C) Cl
D) F

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Which energy level has the element with the least nuclear charge?
The 7th energy level

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I got the valence wrong due to a mistake :(

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I got the valence wrong due to a mistake :(

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Spencer

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Why I Missed These Questions (Paityn York)

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Why I Missed These Questions (Paityn York)

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I feel fairly confident about this topic, so any questions I might have missed were most likely due to careless mistakes.

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Explain why an atom in the fourth energy level would have a higher atomic radius than an atom in the third energy level.

An atom in the fourth energy level would have less of an attraction between the outside electrons and the nucleus. The extra energy level also gives it more radius.

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Which of the following shows the correct configuration of Fe (Iron)?

a) 1s2 2s2 3s2 4s2 3d6
b) 1s2 2s2 2p6 3s2 3p6 4s2 3d6
c) 1s2 2s2 2p6 3s2 3d10 4s2
d) 1s2 2s2 2p6 3s2 3p6 4s2 3d5

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What two elements are in the same energy level?
a)Br and I
b)Pt and Ca
c)B and C
d)Rb and K

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What sub-level are electrons removed from when a Potassium atom is ionized?
4s

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I missed these questions because of careless mistakes.

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What is the electronic configuration of Cl?
A. 1s2, 2s2, 3s2, 3p5
B. 1s2, 2s2, 2p6
C. 1s2, 2s2, 2p6, 3s2
D. 1s2, 2s2, 2p6, 3s2, 3p5

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I actually didn't really miss any questions that pertained to this specific subject/topic.

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I missed questions relating to energy levels because I made careless errors when reading the questions.

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How many energy levels does the element Tellurium have? What is the electron configuration for this element?

Tellurium has 5 energy levels and the electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 5s2, 4d10, 5p4.

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Which of the following elements has electrons in 4 energy levels?

A. Tin
B. Al
C. Niobium
D. Ga

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Explain why Rb has a greater atomic radius then Mg
Rb has a greater atomic radius because Rb has 5 energy levels while Mg only has 3, this causes the radius to be bigger.

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Which of the following elements have the greatest amount of energy levels
A) Na
B) Kr
C) Ga
D) Ag

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Explain the size different between Rubidium and Beryllium using energy levels to explain.

Rubidium is larger in size because it possesses 5 energy levels whereas Beryllium possesses only 2 energy levels.

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Which of the following elements has the greatest atomic radius and why?
Na, K
a. Na, Na has fewer energy levels than K
b. Na, Na has more energy levels than K
c. K, K has fewer energy levels than Na
d. K, K has more energy levels than K

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I don't think I missed any on this :/

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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 all of the material just dumb mistakes on my part.

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Why I missed these questions (Jay Patel)

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Why I missed these questions (Jay Patel)

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I did not understand what the questions were asking for this topic, which I am familiar with.

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Explain why Calcium has a larger radius that the element of Sodium.

Calcium has a larger radius due to it possessing 4 energy levels, compared to 3 energy levels for Sodium. This increase in energy levels results in a new outermost shell, creating a bigger atom and electrons further away from the nucleus.

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Which of the following elements possesses 4 energy levels?
A. Cobalt
B. Barium
C. Sulfur
D. Tin
Correct Answer: A

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What is the electron configuration for the element Niobium and how many energy levels does it have.  The electron configuration for Nb is 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 5s2, and 4d3. It has 5 energy levels.

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How many electrons can be held in the energy level 4?
A. 32
B. 20
C. 18
D. 36

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Which energy level is Ne in?
A:2nd
B:3rd
C:1st
D:6th

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If element X is in energy level 3, what is the maximum number of protons that X could possess?

A. 11
B. 15
C. 16
D. 18

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Write the electronic configuration for the most common ion for the element Ca.

1s ², 2s ², 2p ⁶, 3s ², 3p ⁶

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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 didn't take my time to read through the entire question, which led to me making mistakes that could have been avoided.

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Which of the following has the largest atomic radius and why? (Li, Ba, K, or Sn.)
Ba has the largest atomic radius due to it having 6 energy levels, while the rest only have 2, 3, or 5.

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I made careless mistakes and overthought a lot of the answers.

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What is the electron configuration for Copper?

Answer: 1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^9
(Hope McNish)

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Which of the following has the energy level of 4?
a. H
b. Ga
c. C
d. AL
(Hope McNish)

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Which element has exactly 2 energy levels?

Possible Answers: Li,Be,B,C,N,O,F,Ne

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Which element has the least number of energy levels?
A.Y
B.C
C.Be
D.Hg

Answer: D

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Careless mistakes

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Explain why K has greater ionization energy that Cs.

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Based on energy levels, which element has the greatest ionization energy?

A. Fr

B. H

C. Y

D. Sc

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Which of the following has the smallest amount of energy levels?
A) Au
B) Li
C) Ar
D) In

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For the element Ar, which energy level would you remove electrons from?

You would remove the valence electrons from the highest energy level which would be 3p.

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Which element has the most energy levels?

A.) K
B.) H
C.) Xe
D.) Li

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Does Cerium or Radium have more energy levels?
Radium because it has more shells, just because Cerium is at the bottom of the periodic table does not mean it has more energy levels.

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What has the most energy levels?
A. Fr
B. Na
C. Ne
D. Rn

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I missed these questions because of careless mistakes.

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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 knew the material but misinterpreted the questions.

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Explain why the element, Francium, has a larger radius than that of the element, Barium.
An atom of Francium contains a larger radius than that of Barium because Francium contains seven energy levels whereas Barium contains only six. A greater number of energy levels creates more electron orbitals and therefore a larger atom.

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Which of the following atoms represents an element found on energy level six.
A. Francium
B. Carbon
C. Aluminum
D. Barium
E. Iodine

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When dealing with the common ions and energy levels I mess up what the ions will form.

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Which would have more energy levels, Chlorine or Potassium's most common ion?

Neither. Both of their most common ions form Argon with three energy levels.

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Which of these elements  most common ions will have more energy levels?

A. Silicon
B. Arsenic
C. Boron
D. Gallium

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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 know that energy levels pair with nuclear charge.

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Why would Rb be bigger than K?

Answer:
Rb possesses another energy level than K and it also contains more electrons making the electrostatic attraction decrease.

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Why is it more difficult to remove an electron from the first energy level opposed the the third in Cl?

Answer: The first energy level is closer to the nucleus creating a stronger electrostatic attraction thus making it more difficult, opposed to the third energy level which is farther from the nucleus with less electrostatic attraction rather than the first.

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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 this question, however the longer word problems confused me with the wording.

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What are the similarites shown in the electron configirations of Oxygen and Sulfur?
Oxygen- 1s2, 2s2, 2p4
Sulfur- 1s2, 2s2, 2p6, 3s2, 3p4
The similarities between the two electron configurations are in the 3p and 2p sublevels where both elements have the same amount of electrons.

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Which of the following has the least amount of energy levels?
a. Ca
b. Te
c. Fe
d. He

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Mix up when remembering the sub levels in electron configuring

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Which of the following has the most energy levels?
a. Li
b. Mn
c. Mt
d. F

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Which of the following has 5 energy levels?
A) Rubidium
B) Carbon
C) Yttrium
D) Potassium

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What energy level is Boron in?
A). 1
B). 2
C). 3
D). 7

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Explain why Sc has less energy levels than Ca.
This is because Ca is in the sub level 4s whereas Sc is in 3d. 4(Ca)>3(Sc)

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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 got these wrong because of awful mistakes.

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I missed these questions because I didn't understand how the jump between sub shells effected the ionization energy.

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Why is it more difficult to remove electrons from Ne than from Ar?

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Why is it more difficult to remove electrons from Ne than from Ar?

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While Argon has 3 energy levels, Neon has only two, making the valance electrons closer to the nucleus.

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Give the electron configuration of the element Calcium, in the fourth energy level.

Answer: 1s2 2s2 2p6 3s2 3p6 4s2

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What is the possible number of protons in an element in the 5th energy level?

A. 22
B. 36
C. 45
D. 55

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Why I got these wrong (Victoria Contreras

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Why I got these wrong (Victoria Contreras

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I get these wrong because I forget to take out the electrons from the outermost shell sometimes.

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I missed some of these due to not remembering that sub shells existed.

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Why is it harder to remove electrons from the 1s energy level rather than the 4s energy level?

The 1s energy level is much much closer to the nucleus and is therefore more affected by the electrostatic attraction.

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Why i missed these Questions Colby Dennis

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Why i missed these Questions Colby Dennis

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I missed these questions because I couldn't count.

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What is the electron configuration for the most common ion of Sulfur?
1s ² 2s ² 2p ⁶ 3s ² 3p ⁶

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Reasons why I got it wrong Ell Henderson

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Reasons why I got it wrong Ell Henderson

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I forgot that you look at the energy levels before you look at the nuclear charge left to right

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What happens to your electrons when another energy shell is added? Answer: They get farther apart from each other decreasing the electrostatic attraction between the electrons, and the nucleus.

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Which element has the most energy levels
a.Cr
b.H
c.Cs
d.Na
Answer: Cs

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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 got mixed up on some of the details of the information.

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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 was rushing and messed up the electron configurations.

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Which element has the most energy levels?

A. Hg
B. Cl
C. Li
D. Sb

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As the amount of energy levels increase, what happens to the ionization levels of the valence electrons?
The ionization energy for the valence electrons would go down because they are going farther away from the nucleus due to the number of energy levels going up.

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How many energy levels does the element Phosphorus (P) have?
a. 4
b. 1
c. 3
d. 2

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Question: Write the noble gas configuration for Fe?

Answer: [Ar] 4s² 3d⁶

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Reason I got these wrong.. (Landon Webb) 

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Reason I got these wrong.. (Landon Webb) 

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DUMB DUMB DUMB DUMB mistakes. We aint going to talk about it.. it never happened.. Lord Kelvin forgive me for I have done wrong

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I got these questions wrong because of simple mistakes and looking at the table incorrectly

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Which of these elements is found in the 5th energy level
A Zr
B Br
C Te
D Ni

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I definitely understand the concept of this topic, I think I was just rushing through towards the end and worried about time since I finished at 2:21.

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Which energy level are electrons first taken away from in Pd? Explain

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I made a really stupid mistake and messed up the electron configuration because I stopped on the wrong energy level.

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When looking at the periodic table elements Magnesium (Mg) and Carbon (C) why does Magnesium have less of a electrostatic attraction? Explain.
Magnesium has less of an electrostatic attraction than Carbon because it has more energy levels. Magnesium is in the 3rd energy level while Carbon is in the 2nd energy level. Making Magnesium father away from its nucleus.

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Write the electron configuration for the element Kr.
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6

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Which of the following has 3 energy levels AND five valence electrons?
A. Mg
B. Al
C. V
D. P

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What is the electron configuration for the most common ion of Magnesium? 1s ² 2s ² 2p ⁶