What is atomic number?

• Number of proton

• Number of electron

• Number of neutron

• Number of proton and electron

The most abundant element occurring in the oceans is :

• Hydrogen

• Oxygen

• Nitrogen

• Silicon

Industrial Chemistry deals with the manufacturing of compounds

• In the laboratory

• On microscale

• on commercial scale

• On economic scale

Which of the following element is found in most abundance in the Earth's crust?

• Oxygen

• Aluminum

• Silicon

• Iron

Which of the following substances can be separated into by physical means?

• Element

• Mixture

• Compound

• Radical

Number of protons in the nucleus of an atom is called:

• Mass number

• Atomic number

• Mass unit

• Electron number

Which one is a physical property?

• Smell

• Taste

• Hardness

• All of the above

Nuclear Chemistry has application in ?

• Medical treatment

• Ecology

• Metallurgy

• agriculture

Elements may be:

• solids

• Liquids

• Gas

• All of the above

Example of heterogenous mixture is:

• Air

• Gasoline

• Ice cream

• Soil