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Atomic models: democritus, dalton, thomson, rutherford

Study Slideshow

Describe Daltons atomic model

He thought that atoms are tiny hard spheres

15

Thomson said that atoms are neutral because ...?

the number of positive protons is equal to the number of negative electrons

15

Can some atoms have more electrons than protons?

Yes

10

When an atom has more electrons than protons, it is called an ________

anion

25

When an atom has less electrons that protons, it is called a __________?

cation

25

In Rutherford's model, where are the protons, neutrons and electrons?

Protons and neutrons in the centre, electrons outside

15

What did Rutherford call the centre of the atom?

a nucleus

15

In Rutherford's atomic model, the electrons are _______ing around the nucleus.

orbit(ing)

25

What can you find inside the atom, between the nucleus and the electrons? (in Rutherford's model)

nothing, that space is empty

15

Rutherford's atomic model is usually known as ...?

the planetary model

15

Describe the planetary model.

describe

25

Almost all the mass of the atom is in the _________? (in Rutherford's model)

nucleus

15

Do neutrons have an electric charge?

no, they don't

20

In which sublevel is the last electron of a calcium atom (Z=20)?

3p

25

True or false: The electron configuration for silicon (Z=14) is 1s2 2s2 2p6 3s1 3p1

False

15

The electrons fill the levels and sublevels, starting with the level .... (closest/furthest) to the nucleus.

Closest

15