KO5 - Atomic Structure

An interactive test for your Year 7 Science MKO.

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Part 1: Basic Structure & Size

1. Drag the particles to their correct description.

Electron

Proton

Neutron

In the nucleus, positive charge:

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In the nucleus, no charge:

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Surrounds the nucleus, negative charge:

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2. Where is most of the mass of the atom?

In the nucleus

In the electrons

In the empty space

3. The radius of an atom is about...

4. The radius of the nucleus is...

Part 2: Charge & Ions

5. What is the overall charge of an atom?

Positive

Negative

Neutral (no overall charge)

6. In a neutral atom, the number of electrons is equal to the number of...

7. When an atom LOSES one or more outer electrons, what does it become?

A positive ion

A negative ion

A neutral atom

Part 3: Atomic & Mass Numbers

8. Match the term to its definition.

Atomic Number

Mass Number

Protons

The number of protons:

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The number of protons AND neutrons:

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All atoms of an element have the same number of...

Drop here

Part 4: Isotopes

9. What is an isotope? (Select all that apply)

Atoms of the same element

Atoms with different numbers of protons

Atoms with different numbers of neutrons

Atoms with different numbers of electrons

10. Explain WHY isotopes have a different mass number.

Part 5: Visual Identification

Click on the part of the diagram that shows...

Test Complete!

Well done, Student!

You've completed the Atomic Structure Test.

Your final score:

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KO5 - Atomic Structure

Part 1: Basic Structure & Size

Part 2: Charge & Ions

Part 3: Atomic & Mass Numbers

Part 4: Isotopes

Part 5: Visual Identification

Test Complete!

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