Create an account
the smallest particle an element can be divided into- positively charged nucleus surrounded by electrons.
positively charged centre of an atom- made up on protons and neutrons and is the heavy part.
Number of proton and electrons added together in the nucleus- what makes an element heavy
Made up of oppositely charged ions. Fill other shell of electrons are made by donating electrons. (metal-nonmetal)
Compound made up of sharing electrons to get a full outer shell. (nonmetal-nonmetal)
The same element but different mass number. Same number of protons but different number of neutrons
A reaction will only occur if particles collide with sufficient energy and at the right angle
Surface area and rate of reaction
surface area increases the number of collisions between particles per second so increases the rate of reaction.
Temperature and rate of reaction
Particles have more energy at higher temperatures. This increases number of collisions per second and the effectiveness of the collisions. Increases ROR
Concentration and rate of reaction
Increases number of particles so increases number of collisions per second. Increases the ROR
Catalyst and rate of reaction
Increased the effectiveness of collisions so it increases the ROR. They dont get used up in the reaction
pH greater that 7. produces OH- ions. Metal oxides or hydroxides are bases. Can neutralise acids
A way of measuring thow acidic or basic a substance is - less that 7= acid. 7=neutral. More than 7= base
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together