Atoms and molecules

The atomic symbol of silver is —————

• Si

• S

• Au

• Ag

What is the chemical formula of sodium carbonate?

• Na₂CO₃

• NaHCO₃

• NaCO₃

• Na₂HCO₃

Which of the following is the correct pair of atom and its atomic symbol?

• Sulphur – Su

• Potassium – P

• Phosphorus -P

• Sodium- S

Atomic mass of Chlorine is ————– (u)

• 34

• 34.5

• 35.5

• 35

The atomic symbol of Iron is —————.

• Fe

• I

• Ir

• Fu

The formula of Ammonium Sulphate is —————–

• NH₄SO₄

• NH₄SO₂

• (NH₄)₂SO₄

• NH₂SO₄

The chemical symbol for sodium

• S

• Na

• So

• NA

Mass can neither be created nor destroyed. it is a………………

• Mass recreation

• Mass is cannot reform

• Law of conservation of mass

• Law of conservation

Smallest particle of matter called……….

• Tiny particle

• Tiny molecule

• Molecule

• Atom

Symbol of copper

• Cu

• Co

• cu

• CU