The atoms Flashcards
1
Q
Atom
A
Basic particle of matter in which an element´s characteristic properties are expressed
2
Q
Matter can be…
A
broken down into atoms
3
Q
Number of listed building blocks
A
115 in the periodic table
4
Q
Subatomic particles
A
- protons
- neutrons
- electrons
5
Q
amu
A
atomic mass unit
6
Q
mass of particles
A
- protons: 1.0073
- neutrons: 1.0087
- electrons: 0.0005
7
Q
electric charge of particles
A
- protons: +1
- neutrons: 0
- electrons: -1
8
Q
nucleus
A
protons and neutrons
9
Q
Atomic number
A
protons
10
Q
Mass number
A
neutrons + #protons
11
Q
protons…
A
nevr change
12
Q
electrons…
A
depend on the charge
