AICE CH1 VOCAB

Question 1

Relative Atomic Mass

Answer 1

The average mass of all an element’s isotopes (relative to carbon-12)

Question 2

Nucleon Number

Answer 2

The number of protons and neutrons in an atom

Question 3

Relative Isotopic Mass

Answer 3

The nucleon number of an isotope (ex. Carbon-13 has an RIM of 13.00)

Question 4

Relative Molecular Mass

Answer 4

The total mass of all parts of a compound (ex. C6H6 would be (612)+(61) = 72 g/mol (amu))

Question 5

Compound

Answer 5

A molecule made of 2+ elements, can contain isotopes and ions

Question 6

Relative Formula Mass

Answer 6

Specific to Ionic compounds (finds g/mol)

Question 7

Mass spectrometer

Answer 7

A special method of obtaining accurate info on element isotopes

Question 8

Mole

Answer 8

base unit of a molecule based on Avogadro’s number

Question 9

Avogadro’s number

Answer 9

6.022x10^23

Question 10

Molar mass

Answer 10

mass of a substances divided by number of moles

Question 11

stoichiometry

Answer 11

relationships between the quantities of reactants and products before and after a reactionh

Question 12

empirical formula

Answer 12

the simplest whole number ratio of the elements present ion one molecules or formula unit of a compound (ex. hydrogen peroxide is HO)

Question 13

molecular formula

Answer 13

shows the total # of atoms for each element present in a molecule (ex. hydrogen peroxide is H2O2)

Question 14

state symbols

Answer 14

symbols for the physical state of reactants and products in a reaction. s - solid, l - liquid, g - gas, aq - aqueous (solution in water)

Question 15

spectator ions

Answer 15

when an ionic compound dissolves in water, not all ions take place in the reaction. those that play no part are spectator ions

Question 16

titration

Answer 16

a procedure used to determine the amount of substance present in a solution of unknown concentration, such as neutralization

Question 17

titre

Answer 17

the final reading minus the initial reading in a titration

Question 18

room temperature and pressure

Answer 18

25 degrees celsius, 1 atm pressure

Question 19

Nucleus

Answer 19

The center of an atom, contains protons and neutrons

Question 20

Protons

Answer 20

positively charge subatomic particles

Question 21

neutrons

Answer 21

neutral subatomic particles

Question 22

electrons

Answer 22

negatively charged subatomic particles

Question 23

mass number/nucleon number

Answer 23

total number of protons and neutrons in the nucleus of an atom

Question 24

isotopes

Answer 24

varieties of an atom with varying amounts of neutrons