A mixture of a metal and at least one other element

What is the different between Ar (relative atomic mass) and Mr (relative molecular mass)

Ar = for an element Mr = for a compound

Define "pure" substance

A mixture designed as a useful product

A liquid in which a solid will dissolve

What is crystallisation used to separate

A soluble solid and a solvent (collect solid)

Liquids with different boiling points

An insoluble solid and a liquid

How is the Rf value calculated?

Rf = distance by dye / distance by solvent

Rf = distance by solvent / distance by dye

What is chromatography used for?

To separate different coloured compounds(dyes or inks)

Define "atomic number"

Atoms of the same element that have the same number of protons but different numbers of neutrons

Sum of protons and neutrons in an atom

Atoms of the same element that have the same number of protons but different numbers of neutrons

Sum of protons and neutrons in an atom

What was the Dalton model of the atom?

Neutrons & protons in a +ve nucleus, -ve electrons in shells

Positive nucleus orbited by negative electrons at specific distances from nucleus

1) Mostly empty space 2) Dense, positive mass in the centre (the nucleus)

Describe the Neil's Bohr model of the atom

Positive nucleus orbited by negative electrons at specific distances from nucleus

Neutrons & protons in a +ve nucleus, -ve electrons in shells

1) Mostly empty space 2) Dense, positive mass in the centre (the nucleus)

Describe Rutherford's model of the atom

1) Mostly empty space 2) Dense, positive mass in the centre (the nucleus)

Neutrons & protons in a +ve nucleus, -ve electrons in shells

Positive nucleus orbited by negative electrons at specific distances from nucleus

What did Mendeleev do when creating the modern periodic table?

Left gaps to make the pattern fit

Name the groups in the periodic table (1, 7, 0)

1 = Alkali metals, 7 = Halogens, 0 = Noble gases

Give 4 properties of metals

Good thermal and electrical conductors

Give 3 properties of non-metals

Poor thermal and electrical conductors

What happens to reactivity as you move down group 1?

They become more reactive - it is easier to lose their outer electron.

They become less reactive - it is easier to gain their outer electron.

Two or more different physical arrangements of the same atom e.g. diamond, graphite, graphene

What is an allotrope?

Two or more different physical arrangements of the same atom e.g. diamond, graphite, graphene

Describe what happens in ionic bonding

Electrons are transferred from a metal atom to a non-metal atom = strong electrostatic attraction between oppositely charged ions

Electrons are shared between atoms = strong electrostatic attraction between electrons and nucleus

Electrons become delocalised creating a sea of negative charge = strong electrostatic attraction with positive metal ions & sea of delocalised electrons

Describe what happens in metallic bonding

Electrons are shared between atoms = strong electrostatic attraction between electrons and nucleus

Electrons become delocalised creating a sea of negative charge = strong electrostatic attraction with positive metal ions & sea of delocalised electrons

Electrons are transferred from a metal atom to a non-metal atom = strong electrostatic attraction between oppositely charged ions

Why do simple compounds have low melting and boiling points?

Weak NTERmolecular bonds/forces = easy to move apart

Define Reduction (in terms of oxygen)

Removal of oxygen from a compound

Addition of oxygen to an element

metal carbonate + acid -->

metal salt + water + carbon dioxide

Year 11 Paper 1 - Chemistry

Authored by Ms Bajulaiye

Chemistry

11th Grade

Used 24+ times

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92 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In which state can diffusion NOT happen?

Solid

Liquid

Gas

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which state is the most dense?

Solid

Liquid

Gas

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the name for the change of state when a liquid changes to a gas?

Melted

Evaporation

Condensation

Freezing/Solidifying

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the name for the change of state when a solid changes to a liquid?

Melted

Evaporation

Condensation

Freezing/Solidifying

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the name for the change of state when a gas changes to a liquid?

Melted

Evaporation

Condensation

Freezing/Solidifying

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the name for the temperature where a solid turns into a liquid?

Boiling point

Melting point

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the name for substances made of two or more types of atoms NOT chemically bonded together?

Elements

Compound

Mixtures

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is
the formula for Methane?

CH_4

$H_2O$

$CO_2$

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