C1 Group 1,7,0

In terms of electrons, what do group 1 elements have in common?

• 1 electron shell

• 1 electron in the outer shell

• 1 neutron

• 1 proton in the nucleus

In terms of electrons, what do group 7 elements have in common?

• 7 protons in the nucleus

• 7 electron shells

• 7 neutrons

• 7 electrons in the outer shell

In terms of electrons, what do group 0 elements have in common?

• All shells have 8 electrons in them

• Full inner shell

• Full outer shell

Why is sodium more reactive than lithium?

• Because the outer electron is further away from the nucleus, so is easier to lose.

• Because the outer electron is closer to the nucleus, so is easier to lose.

• Because there is only 1 electron in its outer shell.

• Because there are more shells in sodium.

Why is chlorine more reactive than bromine?

• Because there are only 7 electrons in its outer shell.

• Because chlorine has less electron shells than bromine.

• Because the outer shell is closer to the nucleus, so it is easier to gain an electron.

• Because the outer shell is further away from the nucleus, so it is easier to gain an electron.

Explain why the noble gases are inert

• They are unreactive gases

• They have full outer shells, so do not need to gain or lose electrons

• They have incomplete outer shells, so need to gain or lose electrons

• They are used for lighting.

State the trend in the melting points of the alkali metals

• They all have similar melting points

• Gets lower down the group

• Gets higher down the group

What state is fluorine at room temperature?

• gas

• liquid

• solid

What state is chlorine at room temperature?

• gas

• liquid

• solid

What state is bromine at room temperature?

• gas

• liquid

• solid