Groups & Periods

Front

What are groups in the periodic table?

Back

Groups are vertical columns in the periodic table that contain elements with similar chemical properties and the same number of valence electrons.

Front

What are periods in the periodic table?

Back

Periods are horizontal rows in the periodic table that indicate the number of energy levels an atom has.

Front

How many valence electrons do elements in Group 1 have?

Back

Elements in Group 1 have 1 valence electron.

Front

How many valence electrons do elements in Group 14 have?

Back

Elements in Group 14 have 4 valence electrons.

Front

What does the period number indicate?

Back

The period number indicates the number of energy levels in an atom.

Front

What does the group number indicate?

Back

The group number indicates the number of valence electrons in the outermost shell of an atom.

Front

Which group contains the noble gases?

Back

Group 18 contains the noble gases.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically with other elements.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

Which elements have 7 valence electrons?

Back

Elements in Group 17 have 7 valence electrons.

Front

What is the atomic number of Lithium?

Back

The atomic number of Lithium is 3, which means it has 3 protons.