Chemical Bonding & Structures

An element X reacts with chlorine to form a solid of formula XCl. What could be the electronic structure of X?

• 1s² 2s² 2p⁴

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p⁵

Which solid does not contain covalent bonds?

• Ice

• Diamond

• Silver

• Sulfur

Which is a compound that has giant molecular structure?

• carbon dioxide

• sulfur dioxide

• graphite

• silicon dioxide

The diagram below shows the arrangement of ions in a compound.

Which is the simplest formula of this compound?

• M₂X

• MX

• MX₂

• MX₆

The diagram below shows the bonding between P and Q in the covalent molecule, PQ₂. What are the valence electrons of P and Q?

• P (4) , Q(6)

• P(4), Q(7)

• P(6), Q(7)

• P(6), Q(8)

The bonding in sulfuric acid can be represented by the structural formula.

What is the total number of electrons in the covalent bonds surrounding the sulfur atom?

• 4

• 6

• 8

• 12

Some elements are able to form compounds by either sharing or the transferring of electrons.

Which element is not able to form compounds in this manner?

• oxygen

• fluorine

• hydrogen

• magnesium

Three elements, X, Y and Z have consecutive increasing proton numbers.

If element Y is a noble gas, what will be the formula of the compound formed by X and Z?

• ZX

• ZX₇

• Z₇X

• Z₂X

The diagram shows the structure of a molecule of a substance.

What are the possible electronic configurations of the elements, X and Y in the given structure.

• X: 1s²2s¹

  Y: 1s¹

• X: 1s²2s²2p³

  Y: 1s²2s²2p⁴

• X: 1s²2s²2p⁶3s²3p¹

  Y: 1s²2s²2p⁵

• X: 1s²2s²2p³

  Y: 1s²2s²2p⁶3s²3p⁵

Two elements X and Y, have electronic configurations 1s²2s²2p⁶3s² and 1s²2s²2p⁶3s²3p⁵ respectively.

Which statements describe the compound formed by X and Y?

I : It is soluble in water

II : It has high melting and boiling points

III : It has a crystal lattice structure.

IV : The elements can be recovered by using electricity.

• I and II only

• I, II and III only

• II, III and IV only

• I, II, III and IV