Language of Chemistry

Short hand representation for the atom of a specific element

• element

• atom

• symbol

Symbol of copper is

• Co

• Cu

• Ca

The valency of Chlorine in AlCl₃ is

• 1

• 3

• 2

Sulphur shows valencies

• 2

• 4

• both

The molecular formula for Ammonium carbonate is

• (NH₄ )₂CO₃

• (NH₄ )CO₃

• (NH₄ )₂CO

Name the elements present in Ammonia

• nitrogen

• hydrogen

• both nitrogen and hydrogen

Tags

NGSS.MS-PS1-1

Most suitable element and most widely accepted standard unit for the measurement of atomic mass

• Oxygen

• Carbon

• Nitrogen

The molecular formula for Nitric acid

• HNO₃

• HNO₂

• HNO

Molecular formula for the oxide of calcium is

• CaO

• Ca2O

• none

Tags

NGSS.MS-PS1-1

The symbol and valency of ammonium is

• NH₄ , valency is 1

• NH₃, valency is 1

• NH₃ , valency is 2