Final Chapters 18,19 22

Front

What is a nonpolar molecule?

Back

A molecule that shares electrons equally and does not have oppositely charged ends.

Front

What is a compound in chemistry?

Back

A substance formed from two or more elements in which the exact combination and proportion of elements is always the same.

Front

What is the final step in writing a formula for an ionic compound?

Back

Reduce the subscripts to the smallest whole numbers that retain the ratio of ions.

Front

What happens when sodium (Na) gives up one electron?

Back

It becomes more stable.

Front

What is the physical state of chlorine at room temperature?

Back

Gas.

Front

What is an ionic bond?

Back

A chemical bond formed between two ions with opposite charges.

Front

What is the octet rule?

Back

Atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

What is a covalent bond?

Back

A chemical bond formed when two atoms share one or more pairs of electrons.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the significance of oxidation numbers?

Back

Oxidation numbers indicate the degree of oxidation of an atom in a compound, helping to determine how electrons are transferred in chemical reactions.