define atom
The smallest part of an element that can exist
Define element
A substance made of only one type of atom
Define compound
A substance made of two or more different atoms
Define molecule
A substance made of more than one atom chemically bonded together in fixed proportion
Define mixture
Two or more elements or compounds not chemically bonded together. The chemical properties of each substance in the mixture are unchanged
State the type of mixture seperated by filtration
An insoluble solid in a liquid
State the type of mixture seperated by crystallisation
A soluble solid from a solution
State the type of mixture separated by simple distillation
A solution containing two liquids or a solvent from a solid
State the type of mixture seperated by fractional distillation
A mixture of two or more solvents
State the type of mixture seperated by chromatography
A mixture of solvents or solutions
State three subatomic particles
Protons
Neutrons
Electrons
State the relevent charges of the subatomic particles
Protons: +1
Neutrons: 0
Electrons: -1
What is the atomic number of an atom
The number of protons in an atom
What do all atoms of an element have in common
The same atomic number (number of protons)
How can you find out how many protons are in an atom
The smaller number on an element in the periodic table is the atomic number
Explain how you can tell how many electrons are in an atom
The number of protons equals the number of electrons in an element because atoms are neutral
State the order of size of the following from the smallest to largest: nucleus, electron, atom, molecule
Electron, necleus, atom, molecule
State the relative masses of the subatomic particles
Proton: 1
Neutron: 1
Electron: 0
What is the mass number of an atom
The sum of protons and neutrons in an atoms nucleus
Where can you find the mass number in the periodic table
The larger number on an element in the periodic table is the mass number
How do you calculate the number of neutrons in an atom
Neutron number = mass number - atomic number
Last changed6 months ago