IGCSE Science C2.03-C2.05 test

Which of the following is a noble gas?

• Helium

• Nitrogen

• Oxygen

• Hydrogen

Which of the following is a characteristic of non-metals?

• Good conductors of heat and electricity

• Poor conductors of heat and electricity

• usually have a high melting point

• have 70 elements

• important in our life

Which of the following is an example of a chemical change?

• Boiling of water

• Rusting of iron

• Melting of ice

• Bending of a paper clip

Which of the following elements is a halogen?

• helium

• magnesium

• Fluoria(wrong)

• oxygen

• fluorine

What is the charge of a proton?

• +1

• 0

• -1

• 1/1840

What is the name of the group 1 elements?

• Alkali metals

• Halogens

• Noble gases

• Non-metal

Which of the following is an example of an element?

• Water

• Nitrogen

• Glucose

• Carbon

  dioxide

Which of the following is a characteristic of metals?

• Poor conductors of heat and electricity

• Brittle

• Usually have a high melting point

• Not malleable

What is the atomic number of oxygen?

• 7

• 8

• 9

• 11

What is the difference between a physical change and a chemical change?

• A) A physical change involves a change in the chemical composition of a substance, while a chemical change does not.

• A chemical change involves a change in the chemical composition of a substance, while a physical change does not.

• A physical change involves a change in the color of a substance, while a chemical change does not.

• A chemical change involves a change in the mass of a substance, while a physical change does not.