First CA 3rd term

..... Is a naturally occurring liquid found beneath the Earth's surface.

• Petroleum

• Crude oil

• Fuel

.... and .... are found in crude oil.

• Chlorine and sulphur atoms

• Hydrogen and carbon atoms

• Silicon and argon atoms

..... seperates the crude oil into different component based on their boiling points.

• Refining

• Refreshing

• Readjusting

..... is the process of breaking down of larger hydrocarbon molecules in to smaller ones.

• Fussion

• Cracking

• Fission

.... is the process of combining of monomers to form polymers.

• Reforming

• Polymerisation

• Cracking

The group 8 element are also known as...

• Halogen

• Alkaline

• Noble gas

... and ... are found in the nucleus of an atom.

• Proton and electron

• Proton and neutron

• neutron and electron

.... determine the atomic number of an element.

• Number of electrons

• Number of protons

• Number of neutrons

_{Sodium is an element with mass number of 23 and atomic number which is also number of proton is 11.Find the number of neutron.}

• 11

• 12

• 13

What is the number of electron in

Mg²⁺

^{Proton number=12}

• 10

• 12

• 14