The Modern Periodic Law states that the __________ and __________ properties of elements are periodic functions of their:

• Atomic weights

• Atomic numbers

• Chemical symbols

• Electron masses

The modern periodic table is arranged by:

• Alphabetical order

• Atomic mass

• Atomic number

• Density

Horizontal rows on the periodic table are called:

• Families

• Groups

• Periods

• Elements

Vertical columns on the periodic table are called:

• Families or groups

• Rows

• Periods

• Series

Which of the following is a property of metals?

• Dull appearance

• Brittle

• Poor conductors

• Malleable

Which elements are always found as pairs in nature (diatomic)?

• H, N, O, F, Cl, Br, I

• He, Ne, Ar, Kr, Xe, Rn

• Li, Na, K, Rb, Cs, Fr

• B, C, N, O, F, P, S

Group 17 elements are called __________ and are known for being the most __________ nonmetals.

• Noble gases; stable

• Alkali metals; reactive

• Halogens; reactive

• Transition metals; conductive

Which group of elements has a full outer shell and is extremely stable and unreactive?

• Halogens

• Noble gases

• Alkali metals

• Alkaline earth metals

Dmitri Mendeleev arranged his periodic table by __________, while Henry Moseley later arranged it by __________.

• Atomic number; atomic mass

• Atomic mass; atomic number

• Valence electrons; density

• Density; reactivity

Which element family includes soft, shiny metals that can be cut with a knife and are the most reactive metals?

• Noble gases

• Alkali metals

• Transition metals

• Alkaline earth metals