periodic table

Question 1

period
group

Answer 1

same number of electron shells, same number of valence electrons and similar chemical properties

Question 2

trend of periodic table

Answer 2

from left to right, metallic properties decreases and non-metallic properties increases

Question 3

properties of metals

Answer 3

1. high bp and mp
2. good conductor of elec and heat
3. shiny, ductile, malleable

Question 4

properties of non-metals

Answer 4

1. low mp
2. bad conductor of heat and elec
3. volatile liquid, gas,brittle solids

Question 5

what are group 1 metal called

Answer 5

alkali metal

Question 6

physical properties of alkali metal

Answer 6

good conductor of heat and electricity
compared to typical metals :
- low mp
- low densities
- can be cut with knife, soft

Question 7

chemical properties of alkali metals

Answer 7

1. reacts with cold water to form metal hydroxide and hydrogen

Question 8

why are alkali metals highly reactive

Answer 8

they can easily lose one valence electron from the outermost shell

Question 9

since alkali metals are highly reactive, how to ensure safety

Answer 9

store in under oil

Question 10

what is alkali metal reaction with non-metals

Answer 10

alkali metal + non metal –> salt

Question 11

what is grp 17

Answer 11

halogens

Question 12

physical properties of halogens

Answer 12

1. low mp and bp
2. coloured

Question 13

what is the trend in grp 1

Answer 13

mp and bp decrease down the group
reactivity increase down the group

Question 14

at rtp
what are the states of
F2, CL2, Br2, I2

Answer 14

F2 solid
Cl2 solid
Br2 liquid
I2 gas

Question 15

chemical properties of halogen

Answer 15

1. halogen reacts with metals to form metal halides.
   metal + halogen –> metal halide
2. tendency to attract one valence electron

Question 16

what is the trend in grp 17

Answer 16

bp and mp increases down the group
reactivity decreases down the group

Question 17

what is displacement reaction

Answer 17

it is when a more reactive halogen displaces a less reactive halogen from its halide solution

Question 18

what if a less reactive halogen was used to displace a more reactive halogen

Answer 18

no displacement reaction will occur as a less reactive halogen cannot displace a more reactive halogen

Question 19

what is grp 18

Answer 19

noble gases

Question 20

what are noble gases

Answer 20

inert gases and have a fully filled electronic configuration, no tendency to share/gain/lose electrons

Question 21

physical properties of noble gases

Answer 21

1. odourless, colourless
2. monatomic gaseous element at r.t.p
3. low mp and bp
4. insoluble in water

Question 22

chemical properties of noble gases

Answer 22

1. none. unreactive