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Atom Review
Test Description: Matter and Atom Review
Instructions: Answer all questions to get your test result.
1) When a substance goes from a solid to a liquid, it is:
A
freezing
B
melting
C
evaporating
D
condensing
2) What two subatomic particles are found within the nucleus of an atom?
A
proton and electron
B
proton and neutron
C
neutron and electron
D
proton only
3) Which of the following subatomic particles does an atom share, gain, or lose when reacting with other atoms?
A
protons
B
electrons
C
neutrons
D
protons and electrons
4) The atomic number of an element always tells us how many ____ that element has. This number never changes.
A
atoms
B
protons
C
neutrons
D
electrons
5) Oxygen's atomic number is 8. If the atom is neutral, how many electrons will it have?
A
8
B
10
C
11
D
9
6) If an oxygen atom has 8 protons and 10 electrons, what will it's charge be?
A
-2
B
-1
C
+1
D
+2
7) Which subatomic particle has virtually no mass?
A
protons
B
electrons
C
protons and neutrons
D
neutrons
8) How do you find the number of neutrons an atom has?
A
Atomic mass - atomic number
B
Atomic mass - electrons
C
atomic mass + atomic number
D
Number of Protons - atomic number
9) What is the space around the nucleus called?
A
electron cloud
B
atom
C
subatomic particle
D
nucleus
10) An oxygen atom has 8 electrons when it is neutral. How many electrons will it have it the oxygen ion has a charge of -2?
A
10
B
8
C
7
D
9
11) If oxygen has an atomic number of 8 and an atomic mass of 16, how many neutrons does oxygen have?
A
9
B
7
C
8
D
6
*select an answer for all questions
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