Periodic Table Review (8th Grade)

Argon (Ar) has 3 energy levels (Atomic # 18).

Elements in the Halogen group have 1 valence electron.

Who first developed the periodic table of elements?

How many periods are there in the periodic table?

What is the name of the group of elements that are very reactive METALS?

Mendeleev ORIGINALLY placed elements in order based on increasing __________.

_________ are located on the right side of the periodic table.

How many valence electrons do elements in the Noble gas group have?

Elements are placed into GROUPS based on ________.

How many groups are there in the periodic table?

Mendeleev's periodic table allowed him to leave blanks for undiscovered elements in the correct place.

Elements are placed into periods based on their ___________.

Majority of the periodic table is made up of ________.

What is the name of the group of reactive NONMETALS.

How many valence electrons do the Alkaline Earth Metals have?

Metalloids have properties of both metals and nonmetals.

These elements are located on the left side of the periodic table.

Based on its position on periodic table, how many energy levels does Calcium (Ca) have?

The _________ metals are located in the middle of the periodic table.

Based on its position on the periodic table, how many valence electrons does Strontium (Sr) have? (Atomic # 38)