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WorksheetsIntro into Atoms
Total questions: 12
Worksheet time: 6mins
Name
Class
Date
1.
What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common?
a)
They each identified new elements
b)
They each contributed to the atomic theory
c)
They discovered isotopes
d)
They each had experiments where particles collided
2.
In Thomson's plum-pudding model of the atom, the plums represent
a)
atoms
b)
electrons
c)
neutrons
d)
protons
3.
Which of the following has the least mass
a)
proton
b)
neutron
c)
electron
d)
atom
4.
What is the smallest particle into which an element can be divided and still be the same substance?
a)
electron
b)
proton
c)
neutron
d)
atom
5.
The sum of the protons and neutrons in an atom is known as the
a)
atomic number
b)
mass number
c)
isotope
d)
atom
6.
The number of protons in the nucleus of an atom is known as the
a)
atomic number
b)
mass number
c)
nucleus
d)
amu
7.
a unit of mass that describes the mass of an atom or molecule
a)
atomic mass unit (amu)
b)
neutron
c)
mass number
d)
its very small
8.
atoms that have the same number of protons but different number of neutrons
a)
isotopes
b)
groups
c)
periods
d)
families
9.
Who proposed the plum pudding model?
a)
Democritus
b)
Rutherford
c)
Thomson
d)
Bohr
10.
The ionosphere is located in Earth's upper atmosphere, from the name and understanding ions what can you determine about this area?
a)
there are ions located there
b)
there are charged particles in this area
c)
ions have different number of electrons and protons
d)
all of the above
11.
Protons are able to stays close together even though they have the same charge because of
a)
electrons
b)
neutrons
c)
empty space
d)
density
12.
What is located in the nucleus of an atom
a)
protons
b)
neutrons
c)
electrons
d)
protons and neutrons
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