Electronic Configuration

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does Silicon (Si) have?

Back

Silicon (Si) has 4 valence electrons.

Front

What is the electron configuration of Zinc (Zn)?

Back

The electron configuration of Zinc (Zn) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰.

Front

How many electrons can the third shell of an atom hold?

Back

The third shell can hold a maximum of 18 electrons, but it is typically filled with 8 electrons in the context of the octet rule.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons.

Front

Why are atoms electrically neutral?

Back

Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged).

Front

What charge do electrons have?

Back

Electrons have a negative charge.

Front

What is the maximum number of electrons in the first shell?

Back

The first shell can hold a maximum of 2 electrons.

Front

What is the significance of the electron configuration of an atom?

Back

The electron configuration of an atom determines its chemical properties and reactivity.

Front

What is the difference between core electrons and valence electrons?

Back

Core electrons are the inner electrons that are not involved in bonding, while valence electrons are the outermost electrons that participate in chemical reactions.