Atoms Review

Oh no! I lost an electron

Are you sure?I’m positive

A neutron walks into a restaurant and orders a couple of cokes. As she is about to leave, she asks the waiter how much she owes. The waiter replies, "For you, No Charge!!!"

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Describe the three kinds of particles found in atoms.

Where are they located & what are their charges?

• Protons – in the nucleus, positive charge

• Neutrons – in the nucleus, no charge

• Electrons – outside the nucleus, negative charge

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Identify the four parts of the atom that are pointed out by arrows in the diagram above.

Describe the electrical charges of the structures that are labeled 1, 2, and 3 in the diagram.

1

2 3

1 is the electron and it is negative

2 is the proton and it is positive

3 is the neutron and it is neutral

4 is the nucleus

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A stable carbon atom has the following parts:

– 6 protons

– 6 neutrons

– 6 electrons

Describe the location of each of these parts in a carbon atom.

Protons and neutrons are found in the nucleus of the atom, at the very center. Electrons are

found in an electron cloud that surrounds the nucleus.

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Define these terms:

Atom

Ion

ATOM – the smallest part of matter that has the properties of the matter

ION – an atom that has lost or gained electrons

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What are the biggest parts of an atom?

Protons & Neutrons

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A stable helium atom contains 2 protons, 2 neutrons, and 2 electrons.

Use beads and labels to create a diagram of a stable helium atom. Be sure to include the protons, neutrons, electrons, and nucleus of the atom in your diagram.

Electrons

Protons

Neutrons