Atomic Structure

Question 0

Atomic number

Answer 0

Number of protons (and electrons)

Question 1

Mass number -

Answer 1

Protons + neutrons (top number on element )

Question 2

Isopotopes

Answer 2

Same element with the same atomic number but different mass number

Question 3

Mass spectrometry parts?

Answer 3

Ionisation - sample bombarded with electrons from electron gun

Acceleration - cations accelerated

Deflection- ions deflected through magnetic field based on m/z

Detection - ions hit detector and current is produced .

Question 4

Atomic mass from isotopes

Answer 4

Total abundance

Question 5

Electronic configuration exceptions:

Answer 5

Cr- 1s2 2s2 2p6 3s2 3p6 4d5 4s1

Cu- 1s2 2s2 2p6 3s2 3p6 4d10 4s1

Question 6

Ionisation energy definition

Answer 6

Energy required to convert 1 mole of gaseous atoms into 1 mole of gaseous cations.

Question 7

Ionisation energy trend

Answer 7

Generally increases along a period

Drops between groups 2 and 3- due to electron being removed from 3p level(orbital)

Drops between 5 and 6 - due to electron pair repulsion