Physical Science Mid-Term Exam

The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

Most of the elements on the periodic table are classified as _____.

• Metals
• Nonmetals
• Metalloids
• Periods

This class of elements are sometimes called "semiconductors."

• Metals
• Nonmetals
• Metalloids
• Groups

Who helped to create the first periodic table?

• Dmitri Mendeleev

• Henry Moseley

What period is the element Oxygen found in?

• Period 1

• Period 2

What group is the element Nitrogen found in?

• Group 15

• Group 16

how many rows are on the table

• 6

• 7

how many groups/families are on the table

• 17

• 18

An element's identity is determined by the number of

• electrons.
• protons.

Which subatomic particle has a negative charge in the atom?

• electron
• quark