2021 Chemistry Coolness

• Periods
• Groups

• Periods
• Groups

• energy levels
• valence electrons
• protons
• neutrons

• energy levels
• valence electrons
• protons
• neutrons

Tags

NGSS.HS-PS1-1

• Group 1
• Group 17
• Group 18
• Group 2

Tags

NGSS.MS-PS1-2

The number at the bottom of each square on the periodic table is the ...

• atomic number
• atomic mass
• chemical symbol
• element name

Tags

NGSS.HS-PS1-1

A rule that states that repeating chemical and physical properties of elements change periodically with the atomic number of the elements is the _________.

• periodic law
• alkaline-earth metals
• actinide
• group rule

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Pure forms of these elements are stored in oil so they won't react with oxygen and water in the air.

• Alkali Metals
• Alkaline-earth metals
• Halogens
• Noble Gases

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

• Metals
• Nonmetals
• Metalloids
• Periods

The periodic table has __ periods.

• 18

• 8

• 2

• 7