alkali metals

Question 1

how are rubidium and caesium stored

Answer 1

in glass tubes

Question 2

what is produced when group 1 metals burn in the air and how can you identify the metal

Answer 2

white metal oxides and by the colour of the flames

Question 3

what is produced when alkali metals react in water

Answer 3

hydrogen gas and a metal hydroxide

Question 4

why does the water turn purple after a alkali metal reaction

Answer 4

because the water becomes an alkaline

Question 5

group 1 metals react ___________ when heated in a group 7 gas to form white ____________ salts called metal ________

Answer 5

vigorously, crystalline, halides

Question 6

lithium+water —> _______ ________ sodium+water —> ______ _________

Answer 6

lithium hydroxide
sodium hydroxide

Question 7

group 1 metals are held together by _______ bonds

Answer 7

metallic

Question 8

why do melting and boiling points decrease as you go down group 1

Answer 8

the reactivity increases because the nucleus is further away from the electrons in the outer shell so less energy is needed to break the metallic bonds and turn the solid metal into a liquid then a gas.

Question 9

state and explain the reactivity as you go down the group 1 metals

Answer 9

reactivity increases as you go down the group 1 metals because the outer electron is further away from the nucleus so the attraction between them is decreased therefore the electron can easily be lost

Question 10

when lithium, sodium and potassium reacts with oxygen, what colour flame does it burn with and what does it leave

Answer 10

red, yellow orange, lilac
white powder/residue