Chemistry Unit 1 Topic 1 Atomic structure

Determine the number of neutrons in Fluorine

• 9

• 10

• 18

• 19

Determine the number of electrons for the negative nitrogen ion. Nitrogen has an atomic number of 7.

• 3

• 7

• 10

• 14

What would the nuclear symbol be for the titanium isotope with 27 neutrons?

• Titanium-47

• Titanium-48

• Titanium-49

• Titanium-50

Calculate the relative atomic mass of chlorine using its two naturally occurring isotopes.

Chlorine-35 - amu 34.968853 - abundance 75.77%

Chlorine-37 - amu 36.965903 - abundance 24.23%

• 34.97

• 35.45

• 36.96

• 36.48

Calculate the percentage abundance of the isotope lithium-6 using a relative atomic mass of 6.941. Lithium-6 has an atomic mass of 6.015 amu, and lithium-7 has an atomic mass of 7.016 amu.

• 7.49%

• 92.51%

• 6.94%

• 6.02%

Groups are horizontal on the periodic table

• True
• False

Using the Aufbau principle, Hund's rule and the Pauli exclusion principle, what is the full electron configuration for silicon.

• 1s2 2s2 2p6 3s2 3p6 4s2 3d4

• 1s2 2s2 2p2 3s2 3p2

• 1s2 2s6 2p6 3s2 3p2

• 1s2 2s2 2p6 3s2 3p2

Magnesium has a greater ionisation energy than phosphorus.

• True
• False

Potassium has a greater atomic radius than bromine.

• True
• False

Aluminium has a greater electronegativity than chlorine

• True
• False