Exploring Valence Electrons and Valency

What are valence electrons?

• Electrons that are responsible for the mass of an atom.

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

• Electrons that are involved in thermal conductivity.

• Electrons that are only found in the nucleus of an atom.

How many valence electrons does carbon have?

• 6

• 2

• 8

• 4

Define valency in terms of chemical bonding.

• Valency is the measure of an atom's ability to bond with other atoms, based on its electron configuration.

• Valency is the temperature at which a substance changes state.

• Valency refers to the mass of an atom in grams.

• Valency is the total number of protons in an atom.

What is the valency of sodium?

• 0

• 1

• 3

• 2

How do you calculate the valency of an element?

• Valency is the total number of protons in an atom.

• Valency is calculated based on the number of electrons in the outer shell of an atom.

• Valency is determined by the atomic mass of an element.

• Valency is calculated by the number of neutrons in the nucleus.

What is the atomic number of oxygen?

• 12

• 8

• 10

• 6

Explain the relationship between atomic number and electrons.

• The atomic number is the total number of protons in an atom.

• The atomic number is equal to the number of electrons in a neutral atom.

• Electrons are not related to the atomic number in any way.

• The atomic number is equal to the number of neutrons in a neutral atom.

How many protons are in an atom with atomic number 12?

• 12

• 8

• 14

• 10

What is the valency of chlorine in NaCl?

• -2

• +1

• -1

• 0

How does the number of valence electrons affect an element's reactivity?

• Elements with more valence electrons are always less reactive.

• Valence electrons have no impact on an element's reactivity.

• The number of protons determines reactivity, not valence electrons.

• The number of valence electrons affects an element's reactivity by influencing its ability to gain, lose, or share electrons.