Atomic Structure and Electron Configuration

Question 1

Structure of an atom

Answer 1

Central nucleus (protons and neutrons), surrounded by electrons orbiting in shells

Question 2

Relative mass and charge in all 3

Answer 2

Charge Mass
P +1 1
E -1 1/2000 (negligible)
N 0 1

Question 3

Relative atomic mass/ mass number

Answer 3

Number of protons and neutrons combined, top number

Question 4

Isotopes

Answer 4

Atoms with same number of protons but different number of neutrons

Question 5

Atomic number

Answer 5

Bottom number, how many protons

Question 6

How to work out protons, neutrons and electrons

Answer 6

Bottom number = protons = electrons
Neutrons = top number - bottom number

Question 7

Isotopic Abundance formula

Answer 7

Relative Atomic Mass = Mass number of isotope 1 x percent abundance of isotope 1 + mass number of isotope 2 x percentage abundance of Isotope 2 all divided by 100

Question 8

First 3 shells

Answer 8

First shell max 2 electrons, second 8, third 8