Task 1: Fill in the circles to show the outermost electrons in each of the given elements. Write on the spaces underneath the elements how many covalent bonds each element can
form.
(8)
l

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?