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100
What are the three subatomic particles and their charges?
Protons = positive
Neutrons = neutral
Electrons = negative
100
What are the 4 states of matter and their state symbols?
Solid (s), liquid (l), gas (g), aqueous (aq)
100
What are two things required in a combustion reaction?
Fuel and oxygen
100
Which way do the groups and periods run on the periodic table?
Groups = vertical
Periods = horizontal
100
An atom that loses or gains an electron is called an ____.
Ion
200
What were the 10 sections you had to include in your assignment?
Aim, introduction, hypothesis, method, risk assessment, results - quantitative, results - qualitative, discussion, conclusion and references.
200
Give an example of a factor that can affect the rate of reaction.
E.g. Surface area, temperature, concentration of reactants, agitation, catalysts.
200
Which element has a total of 12 electrons and 2 in its outer shell?
Magnesium
200
What does an exothermic reaction do?
Releases heat.
200
What is the maximum number of electrons in the first, second and third shells?
2,8,8
300
What colour did copper emit in the flame test?
Blue-green
300
What is the atomic and mass number of Antimony?
Atomic = 51
Mass = 121.76
300
What kind of reaction absorbs heat?
Endothermic.
300
Define isotope.
Atoms with the same number of protons but different number of neutrons.
300
What is a polyatomic ion?
An ion made up of more than one atom.
400
Draw and write the electron configuration for Aluminium
400
What does the law of conservation of mass state?
Matter cannot be created or destroyed.
400
Reactions involving carbonates usually produce...
Carbon dioxide.
400
What 2 things do alkali metals produce when they react with water?
Metal hydroxide and hydrogen gas.
400
How many electrons do halogens have in their outer shell and how many do they need to gain/lose to become stable?
7
Gain 1
500
What does collision theory state?
Particles must collide with the correct orientation and with sufficient energy for a reaction to occur.
500
Is this equation balanced? If not, balance it: Fe2O3 + CO --> Fe + CO2
No it is not balanced. Fe2O3 + 3CO --> 2Fe + 3CO2
500
What kind of reaction is this?
AB + C --> AC + B
Single displacement.
500
Explain what happens to electrons when heated up and why we see different colours in the flam test?
When electrons get heated up they jump to the outer shell and then come back down to their original shell. As they come back in they release energy in the form of photons (light) and emit certain wavelengths. These wavelengths correspond to certain energy levels along the emission spectrum and that is why certain elements produce different colours in the flame test.
500
Explain what an open and closed system is.
An open system is one where matter can enter or leave.
A closed system is one where matter cannot enter or leave.