Atom

Diagram shows the structure of atom Q. Which of the following is correct?

• The number of neutron is the same as the number of proton.

• The number of electrons in the orbit is lesser than the proton in the nucleus.

• Atom Q becomes an ion by donating or receiving electron(s).

• The nucleus comprised of protons, electrons and neutrons.

Which of the following is not an atom?

• Gold, Au

• Silver, Ag

• Magnesium, Mg

• Water, H_²O

Which of the following is an ionic substance?

• Salt

  Sodium Chloride

• Water

  H₂O

• Oxygen

  O₂

• Carbon dioxide

  CO₂

Diagrams show an element on the Periodic Table. Which of the following is not true about the element?

• The element has 8 electrons.

• The element has 8 protons.

• The element has 16 protons.

• The element is not a metal.

Which of the following is the correct atomic substance and molecular substance?

• A

  Atom - Iron
  Molecular - Sodium Chloride

• B
  Atom - Zinc
  Molecular - Water

• C

  Atom - Water
  Molecular - Iron

• D
  Atom - Sodium Chloride
  Molecular - Iron

Diagram shows an arrangement of atoms in matter X. Which of the following could be matter X

• Water

• Salt

• Sugar

• Copper

Diagram shows an arrangement of atoms in matter Y.

Which of the following could be matter Y?

• Water

• Salt

• Carbon dioxide

• Copper

Diagram shows an arrangement of atoms in matter Z.

Which of the following could be matter Z?

• Water

• Helium

• Sodium chloride

• Copper