TOPIC 2 - Why are distress flares red? (Atoms) Flashcards
1
Q
group 1
A
alkali metals
2
Q
group 7
A
halogens
3
Q
group 8/0
A
noble gases
4
Q
columns are called
A
groups
5
Q
rows are called
A
periods
6
Q
the two liquid elements
A
Bromine and Mercury
7
Q
air is 80%
A
nitrogen
8
Q
air is 20%
A
oxygen
9
Q
air is 0.04%
A
carbon dioxide
10
Q
mass and charge and location of protons
A
1 amu, +1, nucleus
11
Q
mass and charge and location of electrons
A
0 amu, -1, shell
12
Q
mass and charge and location of neutrons
A
1 amu, 0, nucleus
13
Q
number of protons =
A
atomic number = number of electrons
14
Q
number of electrons =
A
atomic number = number of protons
15
Q
atomic number =
A
number of protons = number of electrons
