Chemistry: Periodic Table 2020

How many valence electrons does oxygen have?

At room temperature, most metals are:

Copper (Cu) is a(n):

On the periodic table, elements with similar properties are found in the same:

Which of the following is NOT a property of metals?

Group 7A on the periodic table is named the:

Group 8A on the periodic table is named the:

Group 2A on the periodic table is named the:

Nitrogen (N) is found in the:

Mendeleev left empty spaces on his periodic table for:

A vertical column on the periodic table is also called a:

The most reactive group of nonmetals is the:

Which one of the following elements would have properties similar to lithium?

The first 2 columns on the periodic table (and He) belong to the:

Which one of the following elements is a nonmetal?

Group 1A on the periodic table is named the:

Uranium (U) is a(n):

The most reactive group of metals is the:

Mendeleev arranged the periodic table in order of increasing:

Elements in the same group on the periodic table have the same number of valence electrons.

80% of all elements are:

Which one of the following elements is unreactive?

A horizontal row on the periodic table is also called a:

Elements that have properties of both metals and nonmetals are called:

How many valence electrons does barium (Ba) have?