Atomic Structure

Question 1

Aufbau principle

Answer 1

Lowest energy sub levels are occupied first

Question 2

Hundt’s rule

Answer 2

Single electrons occupy all empty orbitals within a sub shell before they start to form pairs in orbitals. (Boxes in arrows diagrams)

Question 3

How many orbitals do p, d and f sub shells have?

Answer 3

P = 3 orbitals
D = 5 orbitals
F = 7 orbitals

Question 4

Relative formula mass definition

Answer 4

Sum of all relative atomic masses of all the atoms in a given formula. (Used for ionic substances and also giant structures)

Question 5

Relative molecular mass

Answer 5

Average mass of a molecule relative to 1/12 the mass of a carbon 12 atom

Question 6

How many of each box in the arrow and box method?

Answer 6

1,1,3,1,3,5,1..

Question 7

Relative atomic mass definition

Answer 7

Average mass on an atom of an element compared to 1/12 of the mass is a carbon-12 atom.

Question 8

Relative isotopic mass definition

Answer 8

Mass of one atom of an isotope compared to 1/12 of the mass is an atom of carbon-12.