Chemical Bonds

Diagram 1 shows a shell. The shell contains a natural ionic compound.

Other than oxygen, what elements are contained in the ionic compound?

• Calcium and carbon

• Calcium and hydrogen

• Sodium and carbon

• Sodium and hydrogen

What is formed when an atom receives electron?

• Anion

• Cation

• Ionic bond

• Covalent bond

Which compound is correctly matched with its type of bonds?

• oxygen - ionic bond

• ammonia - covalent bond

• sodium oxide - covalent bond

• sulphur trioxide - ionic bond

Element W react with element X to form an ionic compound with formula WX₂.

The electron arrangement of an atom of X is 2.8.7.

Which of the following is possible electron arrangement of an atom of W?

• 2.8.1

• 2.8.2

• 2.8.4

• 2.8.6

Which of the following compounds is an ionic compound?

• NO₂

• SO₃

• H₂O

• MgBr₂

What is the meaning of ionic bond?

• A bond formed when metal atoms contribute electrons to each other to achieve a stable electron arrangement.

• A bond formed when non-metal atoms share electron to achieve a stable electron arrangement.

• A bond formed by weak Van der Waals forces between the non-metal atoms

• A bond formed when a metal atom transfers an electron to a non-metal atom.

Which substance is an ionic compound?

• Glucose

• Methanol

• Zinc oxide

• Carbon dioxide

Diagram 3 shows the electron arrangement of calcium oxide.

Which of the following is correct about calcium oxide?

• Calcium atom shares electrons with oxygen atom

• Calcium atom transfer electron to oxygen atom

• Oxygen atom releases electron

• Calcium atom receives electron

Element M and element L are located in Group 1 and Group 16 in the Periodic Table respectively.

Element M reacts with element L to form a compound.

What is the chemical formula of the compound?

• ML

• ML₂

• M₂L

• M₂L₃

Which of the following represents the electron arrangement for the compound sodium chloride, NaCl?

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