Test Bank For Integrated Science 7Th Edition By Bill Tiller

Test Bank For Integrated Science 7Th Edition By Bill Tiller

Integrated Science, 7e (Tillery)

Chapter 8 Atoms and Periodic Properties

1) Atoms of an element that have different numbers of neutrons are called isotopes.

2) The volume of an atom is mostly empty space.

3) J.J. Thomson discovered that cathode rays were really a stream of electrons.

4) Millikan found that all of the oil droplets in his apparatus carried a charge that was a multiple of one particular value.

5) The atomic number of an atom is the total number of protons and neutrons.

6) Einstein proposed that electrons on the surface of a metal gradually absorb energy from photons until they have enough energy to leave the surface.

7) An electron moves from one allowed orbit to another only when it absorbs or emits a fixed amount of energy.

8) Heisenberg’s uncertainty principle says that you cannot know the momentum or the position of an electron exactly.

9) Elements in the same row of the periodic table exhibit similar chemical properties.

10) Protons are so much more massive than electrons that you can neglect the mass of electrons when determining the mass of an atom.