Periodic table and electron configuration

Question 1

How is group number linked to electrons in an atom

Answer 1

group number = the number of electrons in the outer shell

Question 2

How is period number linked to electrons in an atom

Answer 2

period number= number of electron shells

Question 3

what is the electron configuration of sodium

Answer 3

2,8,1

Question 4

electron configuration of argon

Answer 4

2,8,8

Question 5

two properties of a group 1 metal

Answer 5

soft, low melting point

Question 6

Lithium + water =

Answer 6

lithium hydroxide + hydrogen

Question 7

how to test for the gas produced when an alkali metal and a water react

Answer 7

lit splint goes pop (hydrogen)

Question 8

all group 1 have in common

Answer 8

only one electron in the outer shell

Question 9

group 7 known as

Answer 9

halogens

Question 10

colour and state of chlorine at room temprature

Answer 10

yelow/green gas

Question 11

test for chlorine

Answer 11

damp blue litmus paper goes white

Question 12

least reactive group 7

Answer 12

astatine

Question 13

more reactive element pushing out a less reactive element from a compound is called

Answer 13

displacment

Question 14

group 7 could displace chrloine from sodium chloride

Answer 14

fluorine

Question 15

colour change when chlorine water is addded to potassium bromide solution

Answer 15

colourless to orange

Question 16

bromine reacts with hydrogen

Answer 16

hydrogen bromide

Question 17

name for element in group 0

Answer 17

noble gas

Question 18

inert means

Answer 18

unreactive

Question 19

why are group 0 inert

Answer 19

full outer shell

Question 20

how do mp and bp change down group 0

Answer 20

they increase