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The atom began as a solid sphere without charges, the theory is:

• John Dalton

• Ernest Reserford

• Noils Bohr

An atom is made up of negative electrons embedded in a sea of positive charges, the theory is

• John Dalton

• J.Thomson

• Ernest Reserford

Who did some experiments with thin metal foils and found that the positive

charge is located within a central nucleus:

• Ernest Reserford

• John Tomson

• Bohr

Who ultimately determined that Electrons are in circular orbits with increasing

energy levels:

• Noils Bohr

• Ernest Reserford

• J.Tomson

A neutral particle, with a mass of 1. It is found in the nucleus of an atom:

• Neutrons

• Protons

• Electrons

A positively particle, with a mass of 1. It is found in the nucleus of an atom

• Proton

• Neutron

• Electron

:

66. Negatively charged particles that orbits the nucleus of an atom:

• Electrons

• Protons

• Neutrons

There are two properties of protons, neutrons and electrons that are especially

important

• mass and electrical charge

• Oxidation reduction react

• Chemical equilibruim

The sum of the ______ and ________ in an atom’s nucleus is the mass number:

• protons and neutrons

• Protons and electrons

• Neutrons and electrons

Atoms have no overall electrical charge and are:

• Neutral

• Positive

• Negative