random flashcards i can't remember topic
potable water
water that is safe to drink
how does the temp of the surroundings change in exothermic reactions
increase
how does the temp of the surroundings change in endothermic reactions
decrease
waste water
water that has been used eg. rainwater, flushing toilet, usually ends up in rivers
exothermic processes
oxidation
combustion
neutralisation
endothermic processes
thermal decomposition
sodium hydrogen carbonate+citric acid
how is waste water treated?
screening - removes large particles and grit.
this creates sludge with is treated with anaerobic digestion + turned into fertiliser.
and effluent which is treated with aerobic digestion + goes into rivers.
where are protons found in atoms
nucleus
what charge do protons have
positive
what is peer review
when research is checked by other scientists to check for errors or mistakes
how are ions formed
when atoms lose or gain electrons
why do atoms form ions
to gain a full outer shell of electrons
what group are noble gases found in
group 8 / 0
relative mass of protons
1
relative charge of protons
+1
relative mass of neutron
1
relative charge of neutron
0
relative mass of electron
0
relative charge of electron
-1
how do you find the protons, electrons and neutrons on the periodic table
16 <— 16 - 8 = 8 neutrons
O
8 <— 8 protons, 8 electrons
what ions do acids release in water
hydrogen
formula of nitric acid
HNO3
which element relights a glowing splint in a experiment
oxygen
which element burns with a squeaky pop in an experiment
hydrogen
