Families
Classes
Trends
Naming & Identifying
History of the Periodic Table
100

This group of metals is highly reactive with water and has only one valence electron.

What are alkali metals?

100

This category of elements is shiny, malleable, and a good conductor of electricity.

What are metals?

100

As you move from left to right across the periodic table, atomic radius does this.

What is decrease?

100

The correct name for Hg(NO3)2.

What is mercury (II) nitrate?

100

This scientist is credited with developing the first periodic table.

Who is Mendeleev?

200

Magnesium and calcium belong to this family of elements?

What are alkaline earth metals?

200

Metalloids have properties of these two classes of elements.

What are metals and nonmetals?

200

Ionization energy does this as you move across a period.

What is increase?

200

The formula for iron (II) nitrate.

What is Fe(NO3)2?

200

Mendeleev arranged his periodic table based on this property.

What is atomic mass?

300

The halogens are found in this group of the periodic table.

What is group 17?

300

Nonmetals tend to do this in chemical reactions to form negative ions.

What is gain electrons?

300

Electronegativity is highest in this element.

What is fluorine?

300

The name for NiCO3

What is nickel (II) carbonate?

300

The modern periodic table is arranged by this property instead.

What is atomic number?

400

This group of gases is known for being unreactive and having full valence shells.

What are noble gases?

400

Silicon is an example of this type of element.

What is a metalloid?

400

This term describes the ability of an atom to attract electrons in a bond.

What is electronegativity?

400

The formula for manganese (III) phosphate.

What is MnPO4?

400

Name one major difference between Mendeleev's table and today's table.

(multiple answers)

500

Noble gases do not react easily because of this reason.

What is having full valence electron shell?

500

List four properties of nonmetals.

What are brittle, poor conductors, dull, and low density?

500

Elements in the same column have the same number of these. (besides Helium)

What are valence electrons?

500

The name for Sn(NO3)4

What is tin (IV) nitrate?

500

Mendeleev left gaps in his periodic table for this reason. 

What are elements that haven't been discovered yet?

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