Atoms and Reactions

Descrição

AS OCR: Unit 1 module 1
clidna
Quiz por clidna, atualizado more than 1 year ago
clidna
Criado por clidna mais de 10 anos atrás
44
3

Resumo de Recurso

Questão 1

Questão
Number of moles= Volume/24
Responda
  • True
  • False

Questão 2

Questão
Number of moles= volume X concentration
Responda
  • True
  • False

Questão 3

Questão
Number of moles= mass/mr
Responda
  • True
  • False

Questão 4

Questão
0 degrees kelvin= 273 degrees celsius
Responda
  • True
  • False

Questão 5

Questão
1 moles= 6.022 X 10^23
Responda
  • True
  • False

Questão 6

Questão
The nucleus is made up of?
Responda
  • Protons, neutrons & electrons
  • Neutrons & protons
  • Protons

Questão 7

Questão
A: The mass number (nucleon number) tells you?
Responda
  • Number of protons
  • Number of protons and neutrons
  • Number of protons, neutrons and electrons

Questão 8

Questão
Z: Atomic (proton) number tells you?
Responda
  • Total number of protons and neutrons.
  • Number of protons.

Questão 9

Questão
Isotopes are atoms of the same element with a different number of neutrons.
Responda
  • True
  • False

Questão 10

Questão
Isotopes have the same mass numbers.
Responda
  • True
  • False

Questão 11

Questão
Between isotopes chemical properties vary but physical properties are the same.
Responda
  • True
  • False

Questão 12

Questão
Relative atomic mass (Ar)
Responda
  • the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the C-12 isotope.
  • weighted mean mass of an atom of an element compared with 1/12 of the mass of a C-12 atom.
  • mass per mole of a substance (g/mol)

Questão 13

Questão
Acids (proton donor, H+ ions being the active ingredient)
Responda
  • HCL
  • MgO
  • NaOH
  • H2SO4

Questão 14

Questão
Bases (proton acceptors)
Responda
  • Metal Oxides and hydroxide
  • White solutions
  • Ammonia
  • Amines

Questão 15

Questão
Alkalis are insoluble bases.
Responda
  • True
  • False

Questão 16

Questão
A salt is an ionic chemical compound.
Responda
  • True
  • False

Questão 17

Questão
A positive ion is known as a?
Responda
  • Cation
  • Anion

Questão 18

Questão
A salt is produced when an acid is neutralised with?
Responda
  • A carbonate
  • A base
  • An alkali

Questão 19

Questão
Ammonium salts can be used as artificial fertilisers.
Responda
  • True
  • False

Questão 20

Questão
The oxidation state of a free element is it's group number.
Responda
  • True
  • False

Questão 21

Questão
The sum of the oxidation states in a molecule= number of atoms in the molecule.
Responda
  • True
  • False

Questão 22

Questão
Oxidation is the?
Responda
  • loss of electrons
  • gaining of electrons

Questão 23

Questão
After reduction the oxidation state?
Responda
  • decreases
  • increases

Questão 24

Questão
A reducing agent is oxidised in the reaction.
Responda
  • True
  • False

Questão 25

Questão
Monatomic ions oxidation states is their charge.
Responda
  • True
  • False

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