Chemistry Final Exam

Front

How is the covalent compound N2O named?

Back

Dinitrogen monoxide

Front

What is the number of formula units in 12.5 moles of calcium phosphate?

Back

7.53 x 10^24 formula units

Front

Calculate the mass number of an atom with 20 protons and 20 neutrons.

Back

40

Front

The electrons that are lost, gained, or shared in chemical bonds are called _______.

Back

Valence electrons

Front

The section labeled D in an atom is known as the?

Back

Nucleus

Front

What is the definition of a covalent bond?

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the formula for calculating the number of particles in a mole?

Back

Number of particles = moles × Avogadro's number (6.022 x 10^23)

Front

Define mass number.

Back

Mass number is the total number of protons and neutrons in an atomic nucleus.

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

What is the significance of the nucleus in an atom?

Back

The nucleus contains protons and neutrons, and it is the center of an atom, determining its mass and identity.