Chemistry Advanced ECA- Cycle 3 Review

Front

What causes the temporary formation of dipoles in nonpolar molecules?

Back

Movement of electrons creating temporary charges.

Front

Why do ionic compounds conduct electricity when dissolved in water?

Back

Because of free-moving ions.

Front

What is the representative unit of a molecular compound?

Back

Molecule.

Front

What is the formula for the compound formed by magnesium ions and nitrogen ions?

Back

Mg₃N₂.

Front

What is a dipole?

Back

A dipole is a separation of positive and negative charges in a molecule.

Front

Define ionic bond.

Back

An ionic bond is a chemical bond formed between two ions with opposite charges.

Front

What is the difference between a molecule and a formula unit?

Back

A molecule is the smallest unit of a covalent compound, while a formula unit is the smallest unit of an ionic compound.

Front

What is the significance of Lewis structures?

Back

Lewis structures represent the bonding between atoms in a molecule and the lone pairs of electrons.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell.

Front

What are valence electrons?

Back

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