Chem Key words

Question 1

Atom

Answer 1

Basic structure of all matter and consists of a nucleus surrounded by electrons

Question 2

Nucleus

Answer 2

Contains protons and neutrons surrounded by electrons

Question 3

Electron

Answer 3

Negatively charged particle with a mass of about 1-1836th that of a proton

Question 4

Nucleon

Answer 4

General term describing both protons and neutrons

Question 5

Proton

Answer 5

A nucleon with a single positive charge and a relative mass of a approx. 1, or more accurately 1.0073 so mass is slightly less than a protons

Question 6

Neutron

Answer 6

Nucleon with no net electric charge and a relative mass of a approx. 1, but more accurately 1.0087 so mass slightly more than a proton

Question 7

Isotope

Answer 7

Atom of the same element but different numbers of neutrons

Question 8

Atomic Number

Answer 8

Aka proton number, number of protons in the nucleus if an atom. Also number of electrons in the neutral atom

Question 9

Relative Atomic Mass

Answer 9

The mass of an atom relative to 1/12th of an atom of carbon-12.

Question 10

Group

Answer 10

Refers to column in the periodic table. Elements in the same group have similar properties

Question 11

Period

Answer 11

Refers to rows in the periodic table. Each period has one more shell of electrons than the previous period

Question 12

Ionisation Energy

Answer 12

Energy needed to remove an electron from an atom in the gas phase. Measured by how tight the electron is held by the nucleus - the strength of the attraction between the positive nucleus and the negative electron

Question 13

Compound

Answer 13

A substance that contains more than one type of atom. Those atoms can be held together in two main ways - by ionic or covalent bonds

Question 14

Alloys: Characteristic

Answer 14

Comprises of a significant percentage of a base metal

Question 15

Suspension

Question 16

Colloids

Question 17

Oxidation

Question 18

Reduction

Question 19

Addition

Question 20

Substitution

Question 21

Polymerization

Question 22

Radical Reactions

Question 23

Displacement

Question 24

Anion

Question 25

Physical State

Question 26

Temperature

Question 27

Pressure concentration

Question 28

Solvents

Question 29

Catalysts

Question 30

Enzymes

Question 31

Surface Area

Question 32

Electromagnetic radiation

Question 33

Light Intensity

Question 34

Homologous

Question 35

Alkenes

Question 36

Alkanes

Question 37

Alkynes

Question 38

Aldehydes

Question 39

Carboxylic Acids

Question 40

Esters

Question 41

Alcohols

Question 42

Empirical Formula

Question 43

Molecular Formula

Question 44

Structural Formula

Question 45

Skeletal Formula

Question 46

Polymer

Question 47

Monomer

Question 48

Repeat Unit

Question 49

Structural Isomer

Question 50

Geometric Isomer

Question 51

Optical Isomer

Question 52

Peptide

Question 53

Macromolecule

Question 54

Amino Acid

Question 55

Protein

Question 56

Codon

Question 57

Anti-Codon

Question 58

Monosaccharides

Question 59

Disaccharides

Question 60

Polysaccharides

Question 61

Cation

Question 62

Co-Factor

Question 63

Prosthetic Group

Question 64

Transition Metal

Question 65

Strength

Question 66

Elasticity

Question 67

Stiffness

Question 68

Malleability

Question 69

Brittleness

Question 70

Hardness

Question 71

Hardness

Question 72

Density

Question 73

Polar

Question 74

Adsorbent

Question 75

Eluent

Question 76

Eluate

Question 77

Mass Spectrometry