What number tells us the number of electrons in an atom?

How many neutrons are there in an atom?

WHat does this hazard symbol mean?

What does this symbol mean?

What does this hazard symbol mean?

Which is a the best diagram of a beaker?

Particles in a _________ are touching but able to move past each other.

What state of matter is this?

Change of state from a gas to a liquid is called

Change of state from a solid to a liquid is called

Change of state from a solid to a gas is called

Compared to a ice, particles in steam

When the pressure is increased, gas particles

The random jiggling movement of a smoke particle or pollen grain when molecules or air or water randomly collide with them is called

__________ is the movement of particles from a region of high concentration to a region of lower concentration

Protons and neutrons are in the ______ of an atom

Electrons are much lighter than protons and neutrons. True or false?

Horizontal rows in the Periodic Table are called ______

Vertical columns in the Periodic Table are called ______

Which of the following are symbols of real elements?

What is the formula of the molecule shown?

Which of the following may indicate a chemical change has happed?

Which two of the following are elements?

Which of the following is a mixture?

Which method of separation would be used to collect a soluble solid from a solution?

Which method of separation would be used to collect an insoluble solid from a solution?

Which method of separation would be used to collect solvent from a solution?

Which method of separation would be used to separate different coloured solutes in a solution?

What number tells us the number of electrons in a neutral atom?

What happens when you close the air hole on a Bunsen Burner?