chemistry

Created by

Brooke Harmel

Cards (33)

what is the relative charge of a neutron, and what is its relative mass
relative charge is zero but the relative mass is one
what is an isotope 
they are different forms of the same element which have the same number of protons but different neutrons
what is a compound
it is a substance formed with two or more different elements held together by chemical bonds
what is a mixture
it consists of two or more elements or compounds that are combined however are not chemically bonded together
what is the plum pudding model 
it described atoms as balls of positive charge with electrons stuck in them
which model replaced the plum pudding model
the nuclear model
what is a metal
an element that forms positive ions
where are metals found on the periodic table
towards the bottom left
properties of metals 
strong, good conductors of hear and electricity and have high melting and boiling points
what charge do electrons have
negative
what charge do protons have
positive
which atom is diamond made up of
carbon atoms
one property of diamond
high melting point
structure of graphite 
made up of hexagons which are joined together to created intermolecular forces which are held together weakly
when a gas turns into liquid, what is that called
condensation
what is a limiting reactant 
a reactant that gets completely used up in a reaction
what gas makes up the largest proportion of the atmosphere
nitrogen being 80%
many believe the atomsphere was abundant in carbon dioxide, where did this come from
volcanic eruptions
name two fossil fuels
coal and natural gas
how were oceans formed (scientifically)
condensation of water vapour in the atmosphere
what is the ph of a natural solution
7
one example of a strong acid
hydrochloric acid
one example of a weak acid
citric acid
what is the name given to the negative electrode in electrolysis
cathode
definition of an exothermic reaction
a reaction that transfers energy to the surroundings
are neutralisation reactions exothermic or endothermic
exothermic
one example of an everyday exothermic reaction 
hand warmers
one example of an endothermic reaction
sports injury packs
function of an enzyme
speeds up a reaction in a living thing
what is a hydrocarbon 
a compound that contains only carbon hydrogen atoms
how do you test for chlorine gas 
put a piece of damp litmus paper into a sample of the gas, chlorine will bleach the litmus paper, turning it white
how do you test for hydrogen
hold a lit splint at the end of a test tube, if its hydrogen then it should make a pop sound
test for oxygen 
put a glowing splint into a test tube and see if it relights