Periodic Table Question Preview (ID: 35839)
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If potassium has an atomic number of 19 and an atomic mass of 39.09, how many neutrons does it have?
a) 19
b) 20
c) 39
d) .09
The periodic table is arranged by
a) atomic masses
b) atomic numbers
c) alphabetically
d) symbols
Atomic mass minus protons equals
a) atomic number
b) electrons
c) neutrons
d) molecules
Number of electrons that can be held in the first 3 energy levels
a) 2, 8, 18
b) 1, 2, 3,
c) 4, 6, 18
d) 9, 14, 68
Who named the atom?
a) Sheldon
b) Democritus
c) Galileo
d) Aristotle
Where is most of the volume of the atom?
a) nucleus
b) between neutrons
c) inside protons
d) electron cloud
Where is most of an atoms mass?
a) in the electron cloud
b) In the nucleus
c) outside the nucleus
d) in quarks
Approximately how many known elements are there?
a) 10
b) 50
c) 100
d) 1000
What 2 subatomic particles are equal in an atom?
a) protons and neutrons
b) electrons and neutrons
c) protons and electrons
d) electrons and positrons
Which subatomic particles are found in the nucleus of the an atom?
a) protons and neutrons
b) protons and electrons
c) electrons and neutrons
d) protons and bigtons
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