Periodic Table Trends

Which elements have one valence electron?

• Magnesium
• Sodium
• Fluorine
• Carbon

Which elements have two valence electrons?

• Sodium
• Fluorine
• Carbon
• Magnesium

Which of the following groups is NOT in the main group?

• Transition metals
• Nonmetals
• Alkali metals
• Halogens

How many additional valence electrons does chlorine need to have a full valence shell?

• one
• two
• seven
• eight

Valence electrons are responsible for the makeup of the chemical properties of elements.

• True
• False

The number of valence shells are responsible for the makeup the chemical properties of elements.

• True
• False

What happens to the atomic radius as you move down a group on the periodic table?

• It decreases.
• It increases.
• It stays the same.
• It varies with different groups.

As you move down group, elements have ___ electron shells that those above them. 

• more
• less
• increased
• decreased

As you move across a period, elements have the same number of ____ as those next to them.

• electron shells
• orbitals
• valence electrons
• total electrons

The horizontal rows on a periodic table are called the ____.

• periods
• weeks
• groups
• days