Atomic Structure Flashcards
1
Q
Nucleus
A
- Consists of the protons and neutrons
- Positively charged because of the protons
- Dense : containing nearly all of the mass of the atom
2
Q
Electron Cloud
A
Occupies the remaining space of an atom and is made of electrons in shells
3
Q
Proton +
A
Nucleus, Relative mass of 1, Positive
4
Q
Neutron /
A
Nucleus, Relative mass of 1, Neutral
5
Q
Electron -
A
Orbiting nucleus, Relative mass of 1/1800, Negative
- Can be lost or gained in chemical reactions
6
Q
Atomic Number
A
Number of protons (electrons is normally equal to the amount of protons)
7
Q
Mass Number
A
Number of protons and neutrons
8
Q
Protons
A
= Atomic Number
9
Q
Neutrons
A
= Mass Number - Number of Protons
10
Q
Electrons
A
= Number of Protons
11
Q
Electron Configuration
A
Refers to the arrangement of electrons in the shells / energy levels. (2, 8, 8)
- Electrons are thinly spread in the shells
