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                                 ENERGY RESOURCES

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                                 ENERGY RESOURCES

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HOME WORK BY MUHAMMAD ABDULLAH(PREFECT)
Q1's answer:   1:-GAS
It is a fuel. We use it in our daily lives for cooking
food. We use it for cooking because it is flammable and has energy to bake or cook.
2:-wood
Wood is also a fuel. Wood has a lot of uses. It is also used for cooking because it can catch fire, it is used to get warm in winter and is used in power companies as a fuel to run the turbine.
3:-crude oil
It is an entirely used fuel. It has various uses. It is used in vehicles, in generators, in motors and some other machinery.

Q2's answer: Sarah's investigation is incorrect because it is not a fair test. She should keep only one thing change, but she changed 2 things.

Q3's answer: Crude oil and natural gas: Millions of years ago, marine plants and animals died and settled on the sea floor. The rivers that entered the sea deposited their load and that load made layers on them. Bacteria and fungi decomposed it and it became crude oil and natural gas.
Coal: The energy in coal comes from energy that was stored in giant plants that lived hundreds of millions of years ago in swamp forests, even before the dinosaurs! When these giant plants and ferns died, they formed layers at the bottom of the swamps. Water and dirt began to pile up on top of the dead plant remains.

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2nd homework by Muhammad Abdullah(prefect)

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2nd homework by Muhammad Abdullah(prefect)

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Q6a: protons=12, electrons=12.    b:neutrons and nucleus. c:1) 2 Mg + O₂ 2 MgO
Q7a) krypton, neon, argon, xenon. b) , nitrogen 2 atoms, atoms, oxygen 2 atoms, hydrogen 2 atoms.
c)carbon dioxide 2 atoms of oxygen and 1 atom of carbon.
methane 1 atom of carbon and 4 atoms of hydrogen

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Homework by Muhammad Abdullah (Prefect of class 7)

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Homework by Muhammad Abdullah (Prefect of class 7)

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1. Sodium (Na)
sodium has 11 protons , 11 electrons, 12 neutrons
2. Fluorine (F)
nine electrons, nine protons, Number of Neutrons | 10
3. Iron (Fe)
Atomic Mass | 55.845 atomic mass units
Number of Protons | 26
Number of Neutrons | 30
Number of Electrons | 26
4. Calcium (Ca)
Atomic Mass | 40.078 atomic mass units
Number of Protons | 20
Number of Neutrons | 20
Number of Electrons | 20

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Homewok by Abdullah Mehmood Q6=A)12B)NeutronC)1)Magnesium ion,Mg2+  2)Oxygen ion,O2-Q7)A)Argon,Neon,Xenon and KryptonB)Nitrogen 2 atoms,Oxygen 2 atoms and Hydrogen 2 atoms.C)Carbon dioxide 2 atom of oxygen 1 atom of carbon, Methane 1 atom of carbon and 4 atom of hydrogen.

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Homewok by Abdullah Mehmood Q6=A)12B)NeutronC)1)Magnesium ion,Mg2+  2)Oxygen ion,O2-Q7)A)Argon,Neon,Xenon and KryptonB)Nitrogen 2 atoms,Oxygen 2 atoms and Hydrogen 2 atoms.C)Carbon dioxide 2 atom of oxygen 1 atom of carbon, Methane 1 atom of carbon and 4 atom of hydrogen.

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J

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Q6=
A)12
B)Neutron
C)1)Magnesium ion,Mg2+
2)Oxygen ion,O2-
Q7)
A)Argon,Neon,Xenon and Krypton
B)Nitrogen 2 atoms,Oxygen 2 atoms and Hydrogen 2 atoms.
C)Carbon dioxide 2 atom of oxygen 1 atom of carbon,
Methane 1 atom of carbon and 4 atom of hydrogen.

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By Hamza Hassan  Date: 2-3-2017                               Topic: Atoms,Molecules and Ions

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By Hamza Hassan  Date: 2-3-2017                               Topic: Atoms,Molecules and Ions

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Q6: a)
Ans: 12
b)
Ans: Neutrons
c)
Ans: i) Magnesium ion, Mg2+
ii) Oxide ion, O2-
Q7: a)
Ans: Krypton, Neon, Argon, Xenon.
b)
Ans: Hydrogen, 2 atoms; Nitrogen, 2 atoms; and Oxygen, 2 atoms
c)
Ans: Carbon dioxide, 1atom of carbon and 2atoms of oxygen;
Methane, 1atom of carbon and 4atoms of hydrogen.

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Abdullah Mehmood, your answer is irrelevant to my question. Please review it again.

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Abdullah science home work atoms molecules and ion

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Abdullah science home work atoms molecules and ion

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Sodium(Na)
11=Electrons(E)
11=Protons(P)
12=Neutron(N)
Fluorine(F)
9=E
9=P
10=N
Iron(Fe)
26=E
26=P
30=N
Calcium(Ca)
20=E
20=P
20=N

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Home Work of Science (Atom, Molecules and Ions)... Zoiba Riaz

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Home Work of Science (Atom, Molecules and Ions)... Zoiba Riaz

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Sodium(Na)
11=Electrons(E)
11=Protons(P)
12=Neutron(N)
Fluorine(F)
9=E
9=P
10=N
Iron(Fe)
26=E
26=P
30=N
Calcium(Ca)
20=E
20=P
20=N

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Dear Class 7 students,
Can you describe the atomic structures of the following elements.
1. Sodium (Na)
2. Fluorine (F)
3. Iron (Fe)
4. Calcium (Ca)

Atomic Structure means that you have to tell how many electrons, protons and neutrons does this atom have?
You need a periodic table to complete your work. Here it is attached.