flashcards first lectures

Question 1

what is the most abundant element in the world

Answer 1

hydrogen

Question 2

comment on melting and boiling points of hydrogen

Answer 2

very low melting and boiling points due to weak molecular forces

Question 3

where does hydrogen come from

Answer 3

in the lab - reaction of acid with electropositive metals

electrolysis - passing electricity through wate

Question 4

ionic hydrides

Answer 4

form with reactive metals where H has a -1 oxidation state

Question 5

covalent hydrides

Answer 5

form with nonmetals (H has a +1 oxidation state)

Question 6

what are the group one elements also known as

and why are they called this

Answer 6

alkali metals

they react with water to form alkaline solution

Question 7

why are group one elements usually stored under oil

Answer 7

because they are so reactive.
only has one electron in their outer shell and easily lose their single valence electron (easily oxidized)

Question 8

characteristic properties of group one metals

Answer 8

soft
shiny
grey metals
low boiling point