Unit 10 Periodic Table test review

Which of the following elements in the halogen group is the most likely to be a solid at room temperature?

• Fluorine

• Bromine

• Chlorine

• Iodine

Why are noble gases inert (unreactive)?

• They all have one electron in their outermost energy level

• They have a full valence shell (8 electrons)

• They only bond with other noble gases

• They form +1 cations

Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element?

• isotope number

• atomic number

• atomic mass unit

• mass number

Most metallic elements have all of these properties except

• A. A high melting point

• B. Being a good conductor of electricity

• C. Being easily crumbled into pieces

• D. A shiny luster

Elements in groups 3 through 12 are called ________.

• metalloids

• transition metals

• noble gases

• isotopes

Which statement is true about the metalloid silicon?

• Silicon is a better conductor of electric current than silver is.

• Silicon does not conduct electric current under any conditions.

• Silicon's ability to conduct electric current does not vary with temperature.

• Silicon is a better conductor of electric current than sulfur is.

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.

Group 7A of the periodic table contains the

• most reactive nonmetals

• most reactive metals

• least reactive nonmetals

• least reactive metals

Two highly reactive elements in Period 2 are the metal lithium and the

• metalloid arsenic

• nonmetal selenium

• nonmetal fluorine

• nonmetal krypton

Atoms of the most reactive elements tend to have

• one or seven valence electrons.

• eight valence electrons.

• four or five valence electrons.

• no valence electrons.