Chemistry Final Review #1

Choose the model that states that electrons, are located in regions called orbitals.

• Rutherford's model

• Bohr's Model

• Planetary Model

• wave-mechanical model

As an electron in an atom moves from a higher energy state to a lower energy state, the atom ___ energy.

Two atoms have the same number of protons but different number of neutrons. They must

• have different mass numbers

• be isomers

• be isotopes

• have different atomic numbers

The element in Group 17, Period 3, of the Periodic Table is classified as a

• metal

• nonmetal

• metalloid

• semimetal

Which element has chemical properties that are most similar to cesium?

• potassium

• calcium

• sulfur

• nitrogen

Which element requires the most amount of energy to remove the most loosely held electron from a gaseous atom in the ground state?

• Na

• Ne

• S

• F

Which terms identify two different categories of compounds?

• ionic and covalent

• covalent and molecular

• ionic and molecular

• covalent and empirical

• empirical and molecular

Which part of a potassium atom in the ground state is represented by the dots in its Lewis electron-dot diagram?

• the electrons in the first shell

• the protons in the nucleus

• the neutrons in the nucleus

• the electrons in the fourth shell

Based on Table S, an atom of which element has the strongest attraction for electrons in a chemical bond?

• aluminum

• fluorine

• magnesium

• sulfur

Which substance can not be broken down by chemical means?

• ammonia

• aluminum oxide

• ammonium chloride

• manganese