Atomic structure

Question 1

Explain why the second ionisation energy of calcium is lower than the second ionisation energy of potassium.

Answer 1

Ca(+) loses electron from a higher (energy) orbital
More shielding (in Ca+)

Question 2

Identify the s-block metal that has the highest first ionisation energy.

Answer 2

beryllium

Question 3

The mass spectrum of tellurium also has a small peak at m / z = 64
Explain the existence of this peak.
(Isotopes are 124, 126, 128, 130)

Answer 3

2+ ion formed / 2 electrons removed
From 128 (Te)

Question 4

Suggest what might cause the relative atomic mass of this sample to be different from the relative atomic mass given in the Periodic Table.

Answer 4

There are other isotopes present