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21 July, 02:35

Check all that apply.

a. Cathode rays have mass.

b. There are subatomic size particles in an atom.

c. In the atom, the particles of the cathode rays are embedded in a diffuse cloud of positive charge.

d. Matter contains negative charge and by inference positive charge.

e. Particles of the cathode rays are fundamental to all matter.

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  1. 21 July, 02:41
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    a. Cathode rays have mass.

    b. They are subatomic size particles in an atom.

    d. Matter contains negative charge and by inference positive charge.

    e. Particles of the cathode rays are fundamental to all matter.

    Explanation:

    The statements above reflect the Thompson model of the atom. Electrons were first known as cathode rays. The Thompson's model viewed the atom as a sphere of negative charges into which positive charges were embedded. This is the plum pudding model of the atom.
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