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Introduction To Atoms
Test Description: Basic information about the structure of an atom
Instructions: Answer all questions to get your test result.
1) Which of the following subatomic particles are found in the nucleus of an atom?
A
electrons and neutrons
B
electrons and protons
C
neutrons and protons
D
ionic compounds
2) Given the size of electrons, what can you infer about atoms?
A
They are always radioactive.
B
They are composed mainly of space.
C
They are very fast-moving.
D
They are a good light source.
3) On an element key, to what does the atomic number refer?
A
atomic weight
B
number of protons
C
atomic mass
D
number of protons and neutrons
4) Which subatomic particle carries a positive charge?
A
neutron
B
electron
C
quark
D
proton
5) If an atom has a neutral charge, what must be true?
A
The number of neutrons must be greater than the number of protons and electrons combined.
B
The number of protons must be less than the number of electrons.
C
The number of electrons must be below 10.
D
The number of protons must equal the number of electrons
6) What part of the atom contains the most mass?
A
orbital space
B
electrons
C
neutrons
D
nucleus of the atom
7) Which subatomic particles comprise most of the atom's mass?
A
protons and electrons
B
protons, neutrons, and electrons
C
electrons and neutrons
D
protons and neutrons
8) If an atom has an atomic number of seven, and an atomic mass of 13, which of the following is true?
A
There are 7 electrons
B
There are 13 protons.
C
There are 6 neutrons.
D
There are 20 electrons.
9) What is the atomic number of an atom that has 8 neutrons and a mass of 16?
A
16
B
8
C
24
D
2
10) What atoms has an atomic number of 6 and an approximate mass of 12?
A
oxygen
B
hydrogen
C
nitrogen
D
carbon
*select an answer for all questions
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