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- 1. Multiple Choice
What particles determine the mass number?
Protons and electrons
Electrons and neutrons
Protons and neutrons
Protons, neutrons, and electrons
- 2. Multiple Choice
What is the mass number of bromine?
35
45
80
79.904
- 3. Multiple Choice
The atomic number is equal to _.
the number of protons
the number of neutrons only
the total number of protons and neutrons
the number of protons, neutrons, and electrons
- 4. Multiple Choice
How many neutrons does this bromine atom have?
35
45
80
115
- 5. Multiple Choice
What is the mass number of this Neon atom?
10
11
21
20
- 6. Multiple Choice
How many electrons does this magnesium ion have?
24
12
10
14
- 7. Multiple Choice
What changes when an atom becomes an ion?
The number of electrons
The number of protons
The number of neutrons
Both the number of neutrons and electrons
- 8. Multiple Choice
How many neutrons does this Neon atom have?
21
11
10
12
- 9. Multiple Choice
What happened to this Magnesium atom to make it an ion?
It LOST electrons
It GAINED electrons
It GAINED protons
It LOST protons
- 10. Multiple Choice
What is the atomic number of this element?
12
24
23
35
- 11. Multiple Choice
Adding or subtracting neutrons makes the element change into
an ion
a mixture
an isotope
a neutral atom
- 12. Multiple Choice
What is the charge on a lithium atom that loses 1 electron?
+1
0
-1
-2
- 13. Multiple ChoiceThe atomic mass is equal to _.the number of protons onlythe number of neutrons onlythe total number of protons and neutronsthe number of protons, neutrons, and electrons.
- 14. Multiple Choice
What is the atomic number of Fe? (click to see image)
26
55.845
56
30
- 15. Multiple ChoiceHow many neutrons does B (Boron) contain?511610.811
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