Atoms Flashcards
1
Q
Name the different subatomic particles.
A
Nucleus
Proton
Neutron
Electron
2
Q
Nucleus:
A
The central core of the atom.
3
Q
Proton:
A
A subatomic particle that has a single positive electrical charge. (+)
4
Q
Neutron:
A
A subatomic particle that has no electrical charge.
5
Q
Electron:
A
A subatomic particle that has a single negative electrical charge. (-)
6
Q
Atomic Number:
A
Number of protons in an element.
7
Q
Mass Number:
A
Sum of protons and neutrons in a nucleus.
8
Q
Atomic Mass:
A
(Weight) is approximately equal to the mass number.
9
Q
True or False:
The number of protons and electrons is the same as the atomic number?
A
True
10
Q
Atom
A
The smallest unit of matter that still retains the properties of an element.
