Group 1 metals

Question 1

how many electrons do they have on their outer shell

Answer 1

1

Question 2

where are they found

Answer 2

group 1

Question 3

why do they react in similar ways

Answer 3

because they all have 1 electron on their outer shell

Question 4

what is the common name for them

Answer 4

Alkali metals

Question 5

what are the most reactive metals in the periodic table

Answer 5

Alkali metals

Question 6

physical properties (4)

Answer 6

• shiny and silvery
• soft
• conduct electricity
• low melting points

Question 7

what sets them apart from other metals (2)

Answer 7

much softer, and they have lower melting and boiling points

Question 8

melting and boiling points increase as you go

Answer 8

UP

Question 9

density increases as you go

Answer 9

DOWN the group

Question 10

group 1 elements react with water and give (2)

Answer 10

metal hydroxide and hydrogen

Question 11

what happens to lithium when in water and what does that mean

Answer 11

it floats and moves around meaning it reacts gently

Question 12

what happens to sodium when it reacts with water

Answer 12

immediately melts and skims around surface of water reacting quickly

Question 13

what happens when potassium reacts with water and what does this mean

Answer 13

immediately melts and catches fire (lilac flame), skimming around the surface meaning it reacts vigorously

Question 14

metals become ____ reactive down the group

Answer 14

MORE

Question 15

How do we know that the alkali metals become more reactive down the group

Answer 15

by observing how the first three react with water

Question 16

potassium burns with what colour flame

Answer 16

LILAC

Question 17

what is added after you react one of the metals with water

Answer 17

universal indicator

Question 18

why do you add universal indicator after you react the metals with water

Answer 18

it shows that group 1 metals have a pH that is alkaline

Question 19

what is the state symbol needed for group 1 hydroxide and why

Answer 19

aq

because it is soluble

Question 20

chemical/symbol equation for the reaction with water

( for potassium for example)

Answer 20

2K(aq) + 2H20 (l) + 2KOH (aq) + H2(g)

Question 21

they form what solutions when reacting with water (acid or alkali)

Answer 21

ALKALI

Question 22

other than water, what do they also react with (less strongly)

Answer 22

oxygen

Question 23

when the metals react, they lose their outer electron and form

Answer 23

positive 1+ ions

Question 24

what does an electronic configuration show

Answer 24

how many electrons there are on each shell

Question 25

give the electronic configuration for lithium

Answer 25

2,1

Question 26

what can be said about their chemical properties, why

Answer 26

they are similar as they each have 1 outer electron

Question 27

why does reactivity increase down the group

Answer 27

the number of shells increases down the group, meaning the outer electron gets further away from the positive nucleus and it weakens the force if attraction between them,
so less energy is needed to overcome the forces of attraction and the outer electron is lost more easily

Question 28

the more easily an electron is lost, the ____ reactive the metal

Answer 28

MORE

Question 29

they become more reactive down the group because :

Answer 29

• atoms have more shells
• attraction between nucleus and outer electron decreases
• outer electron is more easily removed

Question 30

when they lose the outermost electron and form a 1+ion, the other shell becomes the outer shell but it already is full so they obtain a ____ ___ configuration

Answer 30

NOBLE GAS