Ch 5 Quiz Review

When Mendeleev organized elements in his periodic table in order of increasing mass, elements with similar properties were is the same ______________.

The pattern of repeating properties of elements revealed in the periodic table known as the _______________.

Among the alkali metals, the tendency to react with other substances

• does not vary among the members of the group.

• increases from top to bottom within the group.

• varies in an unpredictable way within the group.

• decreases from top to bottom within the group.

Which statement is NOT true about the elements fluorine, chlorine, and iodine?

• They are all halogens.

• They react easily with metals.

• They are similar to noble gases.

• They are all nonmetals.

An alkali metal has one valence electron, while an alkaline earth metal has

• none.

• 2.

• 3.

• 4.

Atoms of the most reactive elements tend to have

• 1 or 7 valence electrons.

• 8 valance electrons.

• 4 or 5 valence electrons.

• no valence electrons.

Two highly reactive elements in Period 4 are the metal potassium and the

• metalloid arsenic.

• nonmetal selenium.

• nonmetal bromine.

• nonmetal krypton.

Which general statement does NOT apply to metals?

• Most metals are ductile.

• Most metals are malleable.

• Most metals are brittle.

• Most metals are good conductors of electric current.

The atomic mass of an element is

• the sum of the protons an neutrons in one atom of the element.

• twice the number of protons in one atom of the element.

• a ratio based on the mass of a carbon-12 atom.

• a weighted average of the masses of the element's isotopes.

The standard on which the atomic mass unit is based is the mass of a

• proton.

• neutron.

• chlorine-35 atom.

• carbon-12 atom.