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Science

The Periodic Table

Covalent bonding - higher tier - Test

1.

Water has a low melting point because:

2.

A single covalent bond involves the sharing of:

3.

An element has the electron structure 2,8,6. To which group of the Periodic Table does it belong?

4.

An element has the electron structure 2,8,8,2. To which period of the Periodic Table does it belong?

5.

Element X has an electron structure of 2,8,5 and the structure of Y is 2,8,7. What is the most likely formula of the covalent compound formed by X and Y?