INORGANIC I

Question 1

group 1 metals are called?

Answer 1

alkali metals

Question 2

UNUSUAL properties of alkali metals (lithium, sodium, pottasium)

Answer 2

1. soft (cut w knife)
2. low MP and BP
3. Low density

Question 3

alkali metals react with water to form?

Answer 3

alkaline solution - hydroxide of the metal + hydrogen gas

Question 4

why do alkali metals react more readily as the RAM increases?

Answer 4

1. RAM increases meaning more electrons
2. more electrons means more shells (more electron shielding)
3. outermost electrons are really far from the nucleus
4. not attracted to the nucleus as strongly
5. therefore they are lost easily

Question 5

group 7 elements are called?

Answer 5

halogens

Question 6

all halogens are … elements

Answer 6

diatomic

Question 7

halogens generally have … melting and boiling points - they have strong bonds …
but weak bonds …

Answer 7

1. low
2. within the molecules
3. between each molecule

Question 8

as the RAM of a halogen increases…

Answer 8

1. the state at room temperature goes from gas - liquid - solid
2. vapour becomes darker
3. MP/BP increases

Question 9

why does the MP/BP of a halogen increase as its RAM increases?

Answer 9

molecules get larger and heavier, harder to break orderly arrangement - stronger intermolecular forces - more energy needed to break

Question 10

halogens do not occur naturally as elements regularly because…

Answer 10

they are very reactive, they are found combined with metals, in salts

Question 11

properties of halogens

Answer 11

1. soft when solid
2. poor conductor of heat/electricity
3. low MP/BP

Question 12

colour/ state at room temp of chlorine + colour of vapour

Answer 12

page green gas + pale green

Question 13

colour/ state at room temp of bromine + colour of vapour

Answer 13

red brown liquid + orange

Question 14

colour/ state at room temp of iodine + colour of vapour

Answer 14

dark grey solid + purple