Question

2 Marks Questions:

1. Give the chemical symbols for the following elements: Gold, Copper , Potassium & Iron.

2. *What do the following symbols represent - i) 1 H & i) H2

3. Neon gas consists if single atoms , what mass of neon contain 6.022 x 1023 atoms.

4. What elements do the following compounds contain ?

i) Water ii) Lead nitrate

5. State the differences between an atom or a molecule.

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Answer 1

Answer:

1

Gold : Au

Coppor : Cu

Potassium : k

IRON : Fe

2

I molecule of hydrogen is 1H

2 molecule of hydrogen is 2H

6160.506 x gram

Nh3

Hope it helps