Chemistry

What are the allotrope of carbon

• Amalgam and solder

• Diamond and bronze

• Fullerene and solder

• Diamond and fullerene

Which element possess the feature of tetravalency

• Carbon

• Sodium

• Magnesium

• Lead

• Nickel

Earth's crust contain only _______

Carbon

• 0.08%

• 0.02%

• 0.005%

• 0.5%

What is the number of electrons present in the valence shell of carbon

• 4

• 3

• 6

• 8

What is the number of electrons present in the valence shell of carbon

• 4

• 3

• 6

• 8

What is the number of electrons present in the valence shell of carbon

• 4

• 3

• 6

• 8

What is the number of electrons present in the valence shell of carbon

• 4

• 3

• 6

• 8