chemistry in general Flashcards
(25 cards)
what are group 1 called
alkali metals
what does group 1 metals produce
metal hydroxide
example- sodium + water=
sodium hydroxide +hydrogen
where do group 1 elements get more reactive
further down the group
what is group 7 called
halogens
where is it more reactive in group 7
the higher up the more reactive
what reaction do halogens produce
displacement reactions
what is a loss of electrons called
oxidation
what is a gain in electrons called
reduction
percent of gases in atmosphere
78 nitrogen
21 oxygen
1 argon
0.04 carbon dioxide
when iron reacts with air what does it form
rust
when sulfur burns in air what colour is it and what does it form
pale blue
sulfur dioxide
what does thermal decomposition of metal carbones produce
carbon dioxide
what does acid + metal go to
salt + hydrogen
what does metal + water go to
metal hydroxide + hydrogen
how does iron occur
when in contact with oxygen and water
how to prevent rusting
barrier- painting and oiling
sacrificial- more reactive metal with the iron eg zinc
what is oxidation
gain of oxygen
what is reduction
loss of oxygen
what does acid + base go to
salt + water
what is an exothermic reaction
reaction that gives out heat
what is an endothermic reaction
reaction that takes in heat
what must particles do react
collide with enough energy to react
what factors affect the rate of reaction
temperature
surface area
catalyst
concentration of solution
