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