halogen

Question 1

what grp is halogen

Answer 1

halogen is grp 7

Question 2

halogens are always ____

Answer 2

diatomic

Question 3

as you go down grp7 the

Answer 3

melting points and boiling points of the halogen increase

they become less reactive because it gets harder to attract extra electron to fill the outer shell when its further away from the nucleus

Question 4

at room temp, cl, br, i is

Answer 4

chlorine = posionous green gas 
bromine = red brown liquid, gives off orange vapour at room temp 
iodine = grey solid

Question 5

test for chlorine gas

Answer 5

holding damp litmus paper over it, chlorine will bleach the litmus paper turning it white

Question 6

halogen only needs to gain _____ as its a 1-

Answer 6

only needs to gain 1 electron, the easier a halogen can attract an electron, the more reactive it is

Question 7

halogens higher up_________

Answer 7

in group 7 are more reactive as they can attract outer electrons easily

Question 8

halogens can react with some metals to form

Answer 8

salts called “metal halides”

Question 9

halogens can also react with hydrogen to form

Answer 9

hydrogen halides