Periodic Table Review

Vertical columns of elements that DO share chemical properties (react the same) because they have the same number of VALENCE ELECTRONS in their outer shells.

• Groups

• Periods

Horizontal rows of elements that share the same number of ENERGY LEVELS but DO NOT share chemical properties.

• Groups

• Periods

The periodic table is arranged by increasing ______ ______, which is equal to the number of protons.

• atomic mass

• atomic number

The ______ are located on the left side of the zig-zag 'staircase' on the Periodic Table. (except for Hydrogen)

• metals

• non-metals

• metalloids

The ___________ are located on the right side of the zig-zag 'staircase' on the Periodic Table (except for Hydrogen)

• metals

• non-metals

• metalloids

The __________ are touching or bordering the zig-zag 'staircase' on the Periodic Table.

• metals

• non-metals

• metalloids

If an element is in group number 15 you know it has _____ valence electrons.

• 1

• 2

• 5

• 15

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If an element is in group number 18 you know it is ______. (will not bond because it has a full valence shell of electrons)

• reactive

• very reactive

• stable

The most ________ group of elements is group number 1 because they can easily give away their one valence electron to have a full valence shell or octet. Group 17 would be next because they can easily receive one electron to have an octet.

• stable

• reactive

The atomic number tells us the number of ____________?

• Neutrons
• Protons
• Electrons