A single element or compound that is not mixed with any other substance.
2 of 16
State 2 benefits of nanoparticles in suncream.
Clear film, better coverage, protective against UV rays
3 of 16
State 2 risks of nanoparticles in suncream.
Easily wash off into ocean, killing marine life. Could be absorbed into the bloodstream. Could damage lungs if inhaled.
4 of 16
What is the pencil line drawn on chromatography paper called?
Origin/base line
5 of 16
What happens to the reactivity as you go down group 7(halogens)? Why?
It decreases as when the radius of the atom increases due to more shells being added, the outer electron is harder to gain as it is further away from the nucleus.
6 of 16
What colour is chlorine gas?
Pale green
7 of 16
What colour is iodine in solution?
Yellow-brown
8 of 16
Describe the state and colour changes in the sublimation of iodine.
Grey/Black crystals to a purple vapour. When vapour is cooled, black crystals form.
9 of 16
Describe the test for chlorine.
Damp blue litmus paper will turn red then bleach to white.
10 of 16
What is another way of identifying chlorine?
It has a 'swimming pool' smell.
11 of 16
Why are metals malleable?
The layers of positive ions can roll over each other.
12 of 16
How do you work out the Rf value?
Distance travelled by spot
_______________________________________
Distance travelled by solvent
13 of 16
What colour would a strong acid be in universal indicator?
Red/Orange
14 of 16
What colour is an alkali in blue litmus paper?
Blue
15 of 16
What is the empirical formula of glucose?
(C6H12O6)
CH2O
16 of 16
Other cards in this set
Card 2
Front
What is a pure substance?
Back
A single element or compound that is not mixed with any other substance.
Card 3
Front
State 2 benefits of nanoparticles in suncream.
Back
Card 4
Front
State 2 risks of nanoparticles in suncream.
Back
Card 5
Front
What is the pencil line drawn on chromatography paper called?
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