The Atom Flashcards
0
Q
Atomic Mass Unit
A
SI unit used to express the masses of particles
1
Q
Protons
A
Positively charged particles of the nucleus
2
Q
Neutrons
A
Particles of the nucleus that have no charge
3
Q
Atomic Number
A
Number of protons in the nucleus
4
Q
Isotopes
A
Atoms that have the same number of protons but not the same number of neutrons
5
Q
Mass Number
A
Sum of protons and neutrons in an atom
6
Q
How to find number of Neutrons in an Atom?
A
Mass Number-Number of Protons=Number of Neutrons
7
Q
Atomic Mass
A
weighted average of the masses of all isotopes of an element
