Inside the Atom - Ch 1; Sec. 1-2 (TNOM)

_____ contain(s) only one kind of atom.

• Matter

• Elements

• Chemicals

• Radioactive materials

Particles in an atom's nucleus that do not have an electric charge are called _____

• neutrons

• electrons

• ions

• protons

The atomic mass of an atom consists of the mass of the _____

• protons and neutrons

• protons and electrons

• neutrons and electrons

• neutrons, protons, and electrons

J.J. Thompson use the fact that _____ charges attract each other in his cathode-ray tube experiment.

• like

• neutral

• atomic

• opposite

Isotopes are atoms of the same element that have a different number of _____

• protons

• electrons

• neutrons

• nuclei

To find the number of neutrons in an isotope, subtract _____

• the atomic number from the mass number

• the mass number from the atomic number

• the number of isotopes from the mass number

• the number of protons from the number of electrons

Each of these is an example of matter EXCEPT _____

• a cloud

• a beam of light

• a dust particle

• air

An atom of the element with atomic number 6 always has _____.

• six electron clouds

• more than six neutrons

• six protons in its nucleus

• an atomic mass of six

The atomic number of an element tells the number of _____ in the nucleus of an atom of that element.

• neutrons

• electrons

• protons

• isotopes

Rutherford's experiment showed that most of an atom is made up of _____

• an electron cloud

• a nucleus

• alpha particles

• empty space