All elements in the same group have the same number of ___.

• protons
• neutrons
• atomic mass units
• outermost electrons

All elements in the same period have the same number of ___.

• protons
• neutrons
• atomic mass units
• energy levels

Which elements have the most similar chemical properties?

• K and Na
• K and Ca
• K and Cl
• K and S

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Elements in the same ________ are more chemically similar.

• group
• period
• club
• table

Tags

NGSS.HS-PS1-1

Bromine is in period ____.

• 3
• 2
• 4

Beryllium is in group ______.

• Group 2
• Group 3
• Group 4
• Group 7

Tags

NGSS.MS-PS1-1

Lithium (Li) is part of the _ family.

• alkali metals
• alkaline earth metals
• halogens
• Noble gases

Chlorine (Cl) is part of the _ family.

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

Magnesium (Mg) is part of the _ family.

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

Neon is part of the _ family.

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