Investigation 2 Chemistry 1

In nature, alkali metals occur as

• elements

• compounds

• complex ions

• gases

If the s & p orbitals of the highest main energy level of an atom are filled with electrons, the atom always has a(n)

• electron pair

• octet

• empty d orbital

• electron in an excited state

A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is called

• electron affinity

• electron configuration

• electronegativity

• ionization potential

A quantum of electromagnetic energy is called a(n)

• photon

• electron

• excited atom

• orbital

The number of possible different orbital shapes for the third energy level is

• 1

• 2

• 3

• 4

The most reactive group of nonmetals is the

• lanthanides

• transition elements

• halogens

• noble gases

The size and shape of an electron cloud are most closely related to the electron's

• charge

• mass

• spin

• energy

The region in space outside the nucleus where an electron can most probably be found is the

• electron configuration

• quantum

• s sublevel

• electron cloud

The Periodic Law allows some properties of an element to be predicted based on its

• position in the Periodic Table

• number of isotopes

• symbol

• color

Hydrogen is placed separately from other elements in the periodic table because it

• is a gas

• does not exist as a free element in nature

• has atomic number of one

• has many unique properties