Reading Groups and Periods

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does Barium (Ba) have?

Back

Barium (Ba) has 2 valence electrons.

Front

What is the significance of an element's period in the periodic table?

Back

The period indicates the number of energy levels (electron shells) that the elements in that row possess.

Front

What element is in group 2, period 2?

Back

Beryllium (Be) is in group 2, period 2.

Front

What element is in group 18, period 1?

Back

Helium (He) is in group 18, period 1.

Front

What are alkali metals?

Back

Alkali metals are the elements in group 1 of the periodic table, characterized by having one valence electron.

Front

Which element is an alkali metal with 6 electron shells?

Back

Cesium (Cs) is an alkali metal with 6 electron shells.

Front

What is the atomic number of Argon?

Back

The atomic number of Argon (Ar) is 18.

Front

How do you determine the group of an element in the periodic table?

Back

The group of an element is determined by the number of valence electrons it has.

Front

What is the relationship between periods and electron shells?

Back

The period number corresponds to the number of electron shells an atom has.