C1: Fundamental Ideas (1) Flashcards Preview

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Flashcards in C1: Fundamental Ideas (1) Deck (12)
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1
Q

Diffusion

A

The automatic mixing of liquids and gases as a result of the random motion of their particles

2
Q

What sort of particles diffuse the quickest?

A

Small, light ones.

3
Q

Does diffusion take place faster in a liquid or a gas?

A

Gas, move around faster, more chance of a collision.

4
Q

Elements

A

Substances made up of only one type of atom.

5
Q

Compound

A

A substance made out of two or more elements chemically bonded together.

6
Q

Mixture

A

When substances are mixed together and intermingle but do not react.
A mixture is not a pure substance.

7
Q

Atomic no.

A

No. of protons.

BOTTOM NUMBER

8
Q

Atomic Mass no.

A

No. of protons plus neutrons.

TOP NUMBER

9
Q

No. of Protons =

A

No. of electrons.

10
Q

What does the number of electrons on the outer shell of an element tell us?

A

What group it is in, and how it reacts.

11
Q

Why does the relative atomic mass only count protons and neutrons?

A

Because electrons weigh 1/2000 of what protons and neutrons weigh, so are generally discounted.

12
Q

Isotopes

A

Atoms of the same element with different numbers of neutrons.