Group 7

Question 1

what are group 7 elements known as

Answer 1

halogens

Question 2

are group 7 poisonous or not poisononus

Answer 2

poisonous

Question 3

what type of elements are group 7 elements

Answer 3

diatomic molecules

Question 4

melting point trend of halogens

Answer 4

melting point increases as you go down the group

Question 5

why does melting point increase down the group

Answer 5

inter molecular forcesincreases as the atoms become larger so more energy is needed to overcome

Question 6

what happens to state of matter as you go down the group

Answer 6

it changes and goes from solids to gases

Question 7

what happens to the colors of elements as you go down the group

Answer 7

they become darker

Question 8

what do halogens react with to form ionic compounds/ metal halide salts

Answer 8

some metals

Question 9

rate of reaction trend down the group

Answer 9

rate of reaction decreases

Question 10

what do halogens react with to form simple molecular structures

Answer 10

non-metals

Question 11

when do halogen displacement reaction occur

Answer 11

when a more reaction halogen displaces a less reactive halogen

Question 12

what happens when adding chlorine solution to colorless potassium bromide/ iodide

Answer 12

• a displacement reaction
• solution:
  orange when bromine is formed
  brown when iodine is formed

Question 13

what happens when chlorine is mixed with bromine

Answer 13

displaces it as its more reactive

CI2 + 2KBr -> 2KCl + bR2
chlorine + potassium bromide -> potassium chloride+ bromine

Question 14

is bromine more reactive than iodine

Answer 14

yes

Question 15

bromine + potassium iodide -> x

Answer 15

potassium bromide + iodine

Question 16

what do halogens have to do in order to gain a full outshell

Answer 16

gain 1 electron