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Ks3 Chemistry > Core Knowledge For Topic > Flashcards

Core Knowledge For Topic Flashcards

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1
Q

What is meant by a mixture

A

Two Or more different particles not chemically joined

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2
Q

What is meant by a molecule

A

Particle made of more than one type of atom chemically joined. Elements are usually non metals

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3
Q

What is between the shells of electrons

A

Nothing

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4
Q

How do we calculate the mass number of an atom

A

Number of protons + number of neutrons

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5
Q

How do we calculate the atomic number of an atom

A

Number of protons

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6
Q

How does the number of protons compare to the number of electrons in an atom

A

They are the same

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7
Q

What does the group number tell you about an atom of an element in that group

A

The number of shells the atom has

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8
Q

What is a solution

A

When a solid dissolves into a liquid

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9
Q

What is a solute

A

The solid that dissolves in a liquid

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10
Q

What is a solvent

A

The liquid a solid turns into

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11
Q

What do we use to describe how easily a solute dissolves

A

Solubility

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12
Q

Substance made of two or more atoms chemically joined

A

Compound

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13
Q

A general name for any small piece of matter

A

Particle

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14
Q

List of all known elements with their symbols

A

Periodic table

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15
Q

How chemists show the combination of elements in a particle e.g CuSO4 or Na

A

Formula

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16
Q

Substance made of one type of atom.(hint: listed on the periodic table)

A

Element

17
Q

The atomic no. And what else has the same number

A

Protons

18
Q

Group goes horizontally but where does periods go

A

Vertically

19
Q

What is a physical reaction

A

Particles are rearranged but no new substances are made eg dissolving and melting. It is normally reversible

20
Q

What suggests a reaction

A

It could be a colour change or the temperature going down or up. In short a change

Ks3 Chemistry (1 decks)

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