Defenitions Of Stuff

Question 1

Transition element

Answer 1

A d-block element which forms at least one stable ion with a partially filled d-sub shell

Question 2

Isotope

Answer 2

Atom with the same number of protons but different number of neutrons

Question 3

Relative atomic mass

Answer 3

Weighted mean mass of an atom of an element compared to 1/12 of the mass of an atom of carbon-12

Question 4

Relative isotopic mass

Answer 4

Mass of an atom of an isotope of an element compared to 1/12 of the mass of an atom of carbon-12

Question 5

Relative molecular mass

Answer 5

Average mass of a molecule compared to 1/12 of the mass of an atom of carbon-12

Question 6

Relative formula mass

Answer 6

Average mass of a formula unit compared to 1/12 of the mass of an atom of carbon-12

Question 7

Acid

Answer 7

Proton donor

Question 8

Base

Answer 8

Proton acceptor

Question 9

Oxidation

Answer 9

Loss of electrons

Question 10

Reduction

Answer 10

Gain in electrons

Question 11

Oxidising agent

Answer 11

Accepts electrons and gets reduced

Question 12

Reducing agent

Answer 12

Donates electrons and gets oxidised

Question 13

Ionic bond

Answer 13

Electrostatic attraction between two oppositely charged ions

Question 14

Covalent bond

Answer 14

Strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms

Question 15

Dative covalent bond

Answer 15

One atom provides both of the electrons

Question 16

First ionisation energy

Answer 16

Energy needed to remove one mole of electrons from one mole of gaseous atoms

Question 17

Le Chatelier’s principle

Answer 17

If there is a change in concentration,pressure or temperature-equilibrium will move to help counteract change

Question 18

Entropy

Answer 18

Measure of dispersal of energy in a system

Question 19

Standard entropy of a substance

Answer 19

Entropy content of one mole of a substance under standard conditions

Question 20

Hess’s law

Answer 20

Total enthalpy change of a reaction is always the same, no matter which route is taken

Question 21

Heterogeneous catalyst

Answer 21

Catalyst which is in different phase to reactants

Question 22

Homogenous catalyst

Answer 22

Catalyst which is in the same state as reactants

Question 23

Equation for free energy chang (delta g)

And temp at which reaction is feasable

And equation for entropy change

Answer 23

Question 24

Born Haber acronym

Answer 24

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