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Vocabulary
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Proton
One unit of positive charge
Electron
One unit of negative charge
Valence electron
The electron in the outer most energy level
Neutron
No charge
Atom
Smallest part of an element
Subatomic particles
The 3 particles that make up an atom: proton, electron, neutron
Nucleus
The place where protons and neutrons are located in an atom
Energy level
Place where electrons are located. Also called shells or rings
Mass number
Number of protons and neutrons in the nucleus. Atomic Mass is the term relating to the average number of protons and neutrons in nucleus (usually a decimal number)
Atomic number
Number of protons in the nucleus
2-8-8
Relating to energy levels, 2 maximum electrons in 1st energy level; 8 maximum in the 2nd energy level; 8 maximum in the 3rd energy level
Isotope
Atoms with the same number of protons but different number of neutrons
Ion
Atoms that lose or gain electrons
Matter
Anything that has mass and takes up space
ATOMS QUIZ
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1. Name the 3 subatomic particles
2. What are the charges of the 3 subatomic particles?
3. Where is most of an atom's mass located?
4. Where are the protons and neutrons located?
5. Where are the electrons located?
6. What does A-P-E M-A-N stand for?
7. Mass number= 35 Atomic number= 17
What is the element?
What is the neutron number?
8. Mass number= 20 Atomic number= 9
What is the element?
What is the neutron number?
9. What is the maxium number of electrons on the first energy level of a Carbon atom?
10. What does an atom's nucleus contain?
11. How many electrons can an atom holds on the first energy level?
On the second energy level?
On the third energy level?
12. Atoms with the same number of protons, but different numbers of neutrons are called __________________?
13. Atoms with the same number of protons, but different numbers of electrons (not neutral) are called ___________________?
14. An atom that has gained or lost electrons are called ________________________?
15. The outer most electrons of an atom are called _________________________?
16. When is an atom neutral?
17. Which subatomic particle has 1 unit of negative charge?
18. Which subatomic particle has 1 unit of positive charge?
19. Which 2 subatomic particles have a weight of 1?
20. Which subatomic particle has a weight of almost zero?
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