CF C2 Structure and Bonding

Which group of elements does not form ions?

• Alkali metals

• Halogens

• Noble Gases

Potassium atoms​ (a)   1 ​ electron

chlorine atoms ​ (b)   ​ 1 electron

They form​ (c)   that have a full outer shell

• lose
• gain
• ions

Which structure represents the arrangement of ions in solid potassium chloride?

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This shows part of a dot and cross diagram for a molecule of water.

Complete the dot and cross diagram

You should only show electrons in the outer shells

Hint:

Hydrogen has 1 outer shell electron

Oxygen has 6 outer shell electrons

What holds polymer molecule 1 and polymer molecule 2 together in a polymer?

• covalent bonds

• electrostatic attraction between ions

• weak intermolecular forces

Which particles carry the electrical charge through a metal wire?

• electrons

• protons

• neutrons

The formula of a copper ion is Cu2+

The formula of a bromide ion is Br-

What is the formula of copper bromide?

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A chlorine atom has 7 electrons in the outer shell.

A hydrogen atom has 1 electron in the outer shell.

Complete the dot and cross diagram.

Use dots (ο) and crosses (x) to represent electrons.

What type of structure is silicon dioxide?

• Giant Covalent

• Ionic Lattice

• Simple Molecular

In silicon dioxide each oxygen atom forms two bonds.

What is the number of bonds formed by each silicon atom?

• 1

• 2

• 3

• 4