Atoms, Compounds, Molecules And Equations

Front 1

Proton

Back 1

A subatomic particle in the nucleus with a positive charge

Front 2

Neutron

Back 2

A subatomic particle in the nucleus with no/neutral charge

Front 3

Electron

Back 3

A subatomic particle surrounding the nucleus with a negative charge.

Front 4

Atom

Back 4

the smallest particle of a chemical element that can exist

Front 5

Ion

Back 5

A positively charged or negatively charged atom or a group of atoms where the number of electrons is different from the number of protons.

Front 6

Atomic number

Back 6

the number of protons in the nucleus of an atom

Front 7

Ionic charge

Back 7

the overall charge due to subatomic particles in an ion

Front 8

Relative Atomic Mass Ar

Back 8

The weighted mean mass of an atom of an element compared with 1/12th of the mass of an atoms of carbon-12

Front 9

Isotope

Back 9

Atoms of the same element with different number of neutrons and different masses

Front 10

Relative isotopic mass

Back 10

the mass of an isotope compared with 1/12th of the mass of an atom of carbon-12

Front 11

Relative Formula/ Molecular Mass Mr

Back 11

The weighted mean mass of the formula unit of a compound compared with 1/12th of the mass of an atom carbon-12

Front 12

Amount of substance (Mole)

Back 12

The amount of any substance containing as many elementary particles as there are carbon atoms in exactly 12g of the carbon-12 isotope i.e 6.022x10^23

Front 13

Avogadro Constant

Back 13

The number of atoms per mole of carbon-12 (6.02x10^23)

Front 14

Molar Mass

Back 14

The mass of a given substance divided by the amount of substance.

Front 15

Molar Gas Volume

Back 15

the volume per mole of gas molecules at a stated room temperature and pressure

Front 16

Empirical Formula

Back 16

A formula that shows the simplest whole number ratio of atoms of each element present in a compound.

Front 17

Molecular Formula

Back 17

A formula that shows the number and type of atoms of each,present in a molecule

Front 18

Stoichiometric Ratio

Back 18

The ratio of the amount, in moles, of each substance in a chemical reaction

Front 19

Spectator Ion

Back 19

A spectator ion is an ion that exists in the same form on both the reactant and product sides of a chemical reaction.

Front 20

Ionic Equation

Back 20

An ionic equation is a chemical equation where it is written as dissociated ions

Front 21

Titration

Back 21

A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution.

Front 22

Equation for gas moles=

Back 22

volume of gas at rtp = number of moles × 24

Front 23

Equation for liquid molecules=

Back 23

Moles= Concentration x Volume

Front 24

Equation for solid molecules=

Back 24

Moles= Mass/Molar Mass

Front 25

Anhydrous

Back 25

Containing no water molecules

Front 26

Hydrated

Back 26

A crystalline compound containing water molecules

Front 27

Water of Crystallisation

Back 27

Water molecules that are bonded into a crystalline structure of a compound

Front 28

Ideal Gas Law

Back 28

The ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions

Front 29

Percentage Yield

Back 29

Percentage yield is a measure of the efficiency of a chemical reaction.

Front 30

Atom Economy

Back 30

The atom economy of a chemical reaction is a measure of the amount of starting materials that become useful products. Inefficient, wasteful processes have low atom economies.