Year 8 chemistry

The number of naturally occurring elements on Earth are about...

The symbol for the element calcium is...

melting and evaporation are examples of ...

Metals...

This is an example of ...

Chemical reactions which create new substances involve ...

Sieving and filtration are examples of ...

Signs of a chemical reaction include...

The symbol for the element chlorine is...

This is an example of ...

What is the difference between the atoms of different elements?

An element is a pure substance which cannot be decomposed into anything simpler. True or false?

The symbol for potassium is...

At room temperature, most elements are...

Sea water is an example of ...

Malleable means...

Water is an example of ...

Sodium, potassium and calcium are non-metals. True or false?

Two or more substances blended together but not chemically bonded is called...

Combustion (burning) and rusting are examples of ...

The change in shape, size, or the state of a substance is called a ...

Metals are...

An atom's atomic number is its number of...

Two or more different atoms are bonded together in a fixed ratio is called ...

Ductile means

An element is a substance entirely made up of identical particles. True or false?

The symbol Na stands for the element...