group 0, 1 and 7

Question 1

what are elements in group 1 called

Answer 1

alkali metals

Question 2

physical properties of group 1 metals

Answer 2

soft, low melting and boiling points, malleable, ductile, conducts heat and electricity , low density

Question 3

reaction of lithium with oxygen

Answer 3

red flame to give a white solid
lithium + oxygen -> lithium oxide

Question 4

reaction of lithium with chlorine

Answer 4

white solid
lithium + chlorine -> lithium chloride

Question 5

reaction of lithium with water

Answer 5

fizzes, melts, moves on surface
lithium + water -> lithium hydroxide + hydrogen

Question 6

reaction of sodium with oxygen

Answer 6

yellow orange flame
produces sodium oxide

Question 7

reaction of sodium with chlorine

Answer 7

white solid
sodium chloride

Question 8

reaction of sodium with water

Answer 8

fizzes, more, melts, moves on surface
may catch fire with yelliw orange flame
sodium hydroxide + hydrogen

Question 9

reaction of potassium with oxygen

Answer 9

purple flame
potassium oxide

Question 10

reaction of potassium bromide with chlorine

Answer 10

yellow solution forms
becomes potassium chloride + bromine

Question 11

reaction of potassium iodide with Chlorine and Bromine

Answer 11

brown solution forms
iodine is displaced and no longer bonded to potassium

Question 12

what happens to reactivity as you go down group seven

Answer 12

less reactive

Question 13

why does reactivity decrease as you go down group seven

Answer 13

atom becomes larger, there are more energy levels, electron gained is further away from the nucleus, weaker attraction between electron gained and nucleus, harder to gain an electron