important things to remember

Question 1

first ionisation energy

Answer 1

energy required when one mole of gaseous atoms forms one mole of gaseous ions with a single positive charge

Question 2

second ionisation enegy

Answer 2

energy required when onle mole of gaseous ions with a single positive charge forms one mole of gaseous ions with a double positive charge

Question 3

atomic radius across period

Answer 3

• decreases
• increased number of protons for electrons which are in the same shell

Question 4

ionic bonding

Answer 4

electrostatic forces of attraction between oppositely charged ions

Question 5

ionic bonding with small ions with high charge

Answer 5

stronger

Question 6

electronegativity

Answer 6

tendancy of an atom in a covalent bond in a molecule to attract electrons in a covalent bond to itself