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The ATOM
The ATOM
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1
Which subatomic particle is positively charged?
POSITRON
NEUTRON
ELECTRON
PROTON
2
Which subatomic particle has no charge?
ELECTRON
PROTON
NEUTRON
NUCLEUS
3
What makes up all matter?
MIXTURES
ATOMS
MOLECULES
COMPOUNDS
4
On the following diagram, what is the region of the atom labeled "X"?
ELECTRON CLOUD
PROTON CLOUD
NUCLEUS
NEUTRON CLOUD
5
What is the mass number of an atom?
The number of PROTONS minus NEUTRONS
The number of NEUTRONS
The number of PROTONS
The number of PROTONS plus NEUTRONS
6
Which of these substances is made of a combination of atoms of one type or another?
NEITHER SALT nor WATER
SALT ONLY
WATER ONLY
BOTH SALT and WATER
7
What is the smallest particle of an element that has the chemical properties of that element?
A PROTON
A NUCLEUS
A MOLECULE
AN ATOM
8
Which subatomic particles are found in the nucleus?
ELECTRONS and NEUTRONS
PROTONS and NEUTRONS
POSITRONS and NEUTRONS
PROTONS and ELECTRONS
9
Which subatomic particle is negatively charged?
PROTON
NUCLEUS
NEUTRON
ELECTRON
10
What is the mass number of this atom?
THREE
ONE
FOUR
TWO
11
Why is our understanding of the nature of the atom referred to as atomic
theory
?
Atoms are too small to see with microscopes.
Because theories are not true, but laws are.
Some scientists don't believe their colleagues.
There is no empirical evidence to support it.
12
On the following diagram, what is the region of the atom labeled "X"?
NUCLEUS
PROTON CLOUD
NEUTRON CLOUD
ELECTRON CLOUD
13
How do the masses of the subatomic particles compare to one another?
The mass of PROTONS, NEUTRONS, and ELECTRONS are all equal
PROTONS = ELECTRONS; both much greater than NEUTRONS
PROTONS = NEUTRONS; both much less than ELECTRONS
PROTONS = NEUTRONS; both much greater than ELECTRONS
14
What is the atomic number of an atom?
The number of PROTONS plus NEUTRONS
The number of PROTONS
The number of NEUTRONS
The number of PROTONS minus NEUTRONS
15
What is the atomic number of this element?
FOUR
ONE
TWO
THREE
