Periodic Table Trends 2

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 Oxygen (O) have?

Back

Oxygen (O) has 6 valence electrons.

Front

What is the significance of the periodic table's groups?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

Which group contains the most reactive metals?

Back

Group 1 contains the most reactive metals, known as alkali metals.

Front

What is the electron configuration of Argon (Ar)?

Back

The electron configuration of Argon (Ar) is 1s² 2s² 2p⁶ 3s² 3p⁶.

Front

How many energy levels does Argon (Ar) have?

Back

Argon (Ar) has 3 energy levels.

Front

What is the relationship between period number and energy levels?

Back

The period number of an element indicates the number of energy levels that its electrons occupy.

Front

Which element is located in period 4 and group 5?

Back

Vanadium (V) is located in period 4 and group 5.

Front

What is the electron configuration of Selenium (Se)?

Back

The electron configuration of Selenium (Se) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁴.

Front

How many electrons can the fourth energy level hold?

Back

The fourth energy level can hold a maximum of 32 electrons.