Periodic Table History and Trends

Elements in the same column of the periodic table always have the same # of _______ as one another.

• Protons
• Neutrons
• Electrons
• Valence Electrons

Rows on the period table are called _____ while columns are called _____.

• groups, families
• groups, periods
• periods, groups
• families, groups

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

Which is a halogen?

• Helium
• Chlorine
• Oxygen
• Neptune

Which periodic group has the smallest atomic radius?

• Alkali metals
• Halogens
• Noble Gases
• Transition metals

Which has the greater EN: 
Cl or Al?

• Cl
• Al

Which of the following will have a larger radius than Zinc?

• Gallium
• Aluminum
• Magnesium
• Strontium

Ions are formed when atoms gain or lose ___.

• electrons

• protons

• neutrons

• atomic mass