The Boron Family

The boron family is named after the last element in its family.

• True

• False

How many valence electrons does the boron family have?

• 1

• 2

• 3

• 4

• 5

The most abundant metal in the earth's crust is

• Aluminium

• Iron

• Copper

• Tin

The reason why Tl shows +1 oxidation state is because

• it is a metal.

• inert pair effect.

• it is very reactive.

• it is an anomaly of Group IIIA.

Boron is electron deficient and hence, its neutral compounds are electron donors.

• True

• False

Aluminium is less reactive due to the formation of a stable oxide layer on its surface.

• True

• False

The picture shows the halide of boron.

• True

• False

Boron and silicon are both non-metals.

• True

• False

What is the chemical formula of diborane?

• B₅H₉

• B₂H₆

• B₂H₃

• B₃H₉

Choose the correct statements on the structure of diborane.

• Electron deficient structure causing H-bridging.

• sp² hybridization.

• 2B are bonded to 4 H.

• 2 B are connected by hydrogen bonding.