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