Hydrogen is grouped with the alkali metals because it _____.

a. has one electron in the OEL c. is a metal

b. does not easily form compounds d. is a gas

A chemical family or group that has the most members that exist as

diatomic molecules is _____.

Any element with an atomic number greater than 92 is a ______.

a. transition element c. transuranium element

b. member of the lanthanide series d. noble gas

The only noble gas with less than eight electrons in its outer level is

_______.

a. neon b. argon c. helium d. krypton

. Elements that lie along the “stair-step line” of the periodic table are

________.

a. liquids b. metalloids c. metals d. radioactive

The appearance of “most” solid metals can be described as _____.

Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ

from one another atomically by two _____.

a. carbons b. electrons c. neutrons d. protons

Metals can be used to make wire because they are _____.

A term that means “salt former” is _____.

At room temperature, most metals are _____.

a. solids b. liquids c. gasses d. stable

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____.

a. 30 b. 52 c. 0.56 d. 56

Atoms of the same element with different numbers of neutrons are called _____.

Horizontal rows of the periodic table are called _____.

a. groups b. families c. clusters d. periods

Particles of matter that make up protons and neutrons are _____.

a. electrons b. isotopes c. atoms d. quarks