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- 1. Multiple Choice
What does the atomic number identify?
The number of neutrons.
The number of protons.
The number of protons + neutrons.
The number of electrons.
- 2. Multiple Choice
The number of protons + neutrons in the nucleus is referred to as what?
Atomic number
Atomic mass
Mass number
Isotope number
- 3. Multiple Choice
Atoms of the same element with a different number of electrons are called ___________.
elements
isotopes
ions
neutral
- 4. Multiple Choice
Which subatomic particle is used to identify the atom, as it never changes?
Protons
Neutrons
Electrons
- 5. Multiple Choice
How many neutrons are in the following atom?
47
61
108
155
- 6. Multiple Choice
How many protons are in the following atom?
82
125
207
189
- 7. Multiple Choice
How many neutrons are in the isotope Carbon-14?
6
8
12
14
- 8. Multiple Choice
An ion with a positive charge has __________.
the same number of protons and electrons.
lost a proton.
lost an electron.
gained an electron.
- 9. Multiple Choice
How many electrons does the following ion have?
10
12
14
22
- 10. Multiple Choice
How many electrons does the following ion have?
3
7
10
14
- 11. Multiple Choice
Which of the following describes a positive ion?
10 protons, 12 electrons
12 protons, 10 electrons
12 protons, 12 electrons
- 12. Multiple Choice
Atoms of the same element with a different number of neutrons are called _________.
elements
isotopes
ions
neutral
- 13. Multiple Choice
Which of the following describes a negative ion?
8 protons, 8 neutrons, 8 electrons
8 protons, 8 neutrons, 10 electrons
8 protons, 10 neutrons, 8 electrons
8 protons, 8 neutrons, 6 electrons
- 14. Multiple Choice
What is the purpose of the neutrons?
Identifies the element.
Holds the nucleus together.
Determines reactivity.
- 15. Multiple Choice
Which subatomic particles would repel away from each other?
protons and neutrons
protons and electrons
electrons and electrons
electrons and neutrons
- 16. Multiple Choice
Why are atoms electrically neutral?
The neutrons balance out any charge.
There are more neutrons than protons or electrons.
Protons and electrons cancel each other out because they have opposite charges.
Neutrons have no charge which makes the who atom neutral.
- 17. Multiple Choice
The majority of an atom's mass comes from which particle(s)?
Protons
Protons + electrons
Electrons
Protons + neutrons
- 18. Multiple Choice
Which is true of the following beryllium atom?
4 protons and 9 neutrons
5 neutrons and 4 electrons
9 protons and 4 neutrons
4 protons and 2 electrons
- 19. Multiple Choice
Which is true about the following chlorine atom?
17 protons and 36 neutrons
17 protons and 19 electrons
17 protons and 19 neutrons
36 protons and 17 neutrons
- 20. Multiple Choice
Atomic mass is __________.
a whole number
protons + neutrons
the mass found on the periodic table
equal to the mass number of the most common isotope
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