Unit 2 - Section 1

Question 1

What is the atom radius across a period?

Answer 1

It decreases as there are more protons but the electrons are on the same shell

Question 2

What effects melting points?

Answer 2

It is the type of bonding eg metallic bonding gets stronger across periods as there are more electrons in the sea of delocalised electrons, but then elements bond covalently differently so there melting points are different

Question 3

What is the first ionisation energy’s?

Answer 3

The energy required to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions