3.1.2 Elements

Question 1

What are properties of metals?

Answer 1

High MP/BP
Electrical conductors
Thermal conductors
Malleable
Shiny

Question 2

What are properties of non-metals?

Answer 2

Low MP/BP
Electrical insulators
Thermal insulators
Brittle
Dull`

Question 3

By looking at the periodic table, how do you know if the element is a metal or non-metal?

Answer 3

There is a staircase line between B and Al that separates them. On the left - Metals. On the right - Non-metals.

Question 4

What are diatomic molecules?

Answer 4

Atoms in the element are paired up. Their chemical formula is their symbol but with subscript 2 to show pairings.

Question 5

What are the diatomic molecules?

Answer 5

Hydrogen - H2
Nitrogen - N2
Oxygen - O2
Fluorine - F2
Chlorine - Cl2
Bromine - Br2
Iodine - I2
Astatine - At2

Question 6

How many diatomic molecules are there?

Answer 6

8

Question 7

What is an element?

Answer 7

An element is a substance containing only one type of atom.