Groups in the Periodic Table

Question 1

what are group 1 elements known as?

Answer 1

alkali metals

Question 2

what are group 7 elements known as?

Answer 2

halogens

Question 3

what are group 0 elements known as?

Answer 3

nobel gases

Question 4

what are the properties of alkali metals?

Answer 4

• soft

- low melting points

Question 5

what happens with lithium when it reacts with water?

Answer 5

move around on surface fizzing furiously

Question 6

what happens to sodium when its put with water?

Answer 6

fizzes on surface and melts in the heat of the reaction

Question 7

what happens to potassium when its put with water?

Answer 7

fizzes and melts with the heat of the reaction

Question 8

what is the order of reactivity of the group 1 elements?

Answer 8

reactivity increases down the group

Question 9

what type of ions for group 1 become?

Answer 9

1+ ions

Question 10

why does reactivity increase down the group?

Answer 10

the other electron is easily lost down the group as it further from the nucleus

Question 11

what is the colour and physical state of chlorine at room temperature?

Answer 11

green gas

Question 12

what is the colour and physical state of bromine at room temperature?

Answer 12

red brown liquid which gives off orange vapour

Question 13

what is the colour and physical state of iodine at room temperature?

Answer 13

dark grey crystallised solid which gives off purple vapour when heated

Question 14

what are the physical properties of the group 7 elements?

Answer 14

melting and boiling points increase down the group

Question 15

what type of molecules are the halogens?

Answer 15

diatomic so always 2 of them connecting using a covalent bond

Question 16

what is the chemical test for chlorine?

Answer 16

• damp blue litmus paper

- it will bleach the paper turning it white

Question 17

how do the halogens react with metals to form metal halides?

Answer 17

• form salts called metal halides

- higher up are more reactive as they can attract metal electrons more easily

Question 18

what happens when a halogen reacts with hydrogen?

Answer 18

• forms hydrogen halides

- dissolve in water and form acidic solutions

Question 19

a more reactive halogen with displace…

Answer 19

a less reactive one

this is called a displacement reaction

Question 20

why are Nobel gases chemically inherit?

Answer 20

• full outer shell

- they don’t easily give up or gain electrons

Question 21

what does the uses of noble gases depend on?

Answer 21

inhertness
low density
flammability

Question 22

what can helium be used for?

Answer 22

• airships, balloons

- lower density than air so floats

Question 23

what can argon be used for?

Answer 23

• light bulbs

- not flammable so stops things from burning

Question 24

what are the trends in noble gases?

Answer 24

-boiling, melting, denotes increase down the group