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Atomic theories, models and structure

Study Slideshow

A change in the number of _______ changes the identity of the atom.

proton/s

15

The cluster of particles in the center are called...

nucleus

10

The Atomic Number (Z) of Phosphorus.

15

5

The Atomic Number (Z) of copper.

29

5

To calculate the number of Neutrons in an atom, subtract the __ from the ____.

Atomic Number / Atomic Mass or proton / Atomic Mass

10

For an atom to have a +1 charge the Number of _____ must be greater than the number of ___.

Protons / Electrons

15

For an atom to have a net charge of zero both ___ and ____ must be the same.

Protons and Electrons

5

A neutral atom occurs when _____.

The number of Protons = the number of Electrons

10

Which scientist is responsible for the discovery of the nucleus?

Ernest Rutherford

15