Chemistry Final Exam Review

Front

What causes the shielding effect inside an atom?

Back

The electrons between the nucleus and the valence shell.

Front

Find the percent composition of N2S2.

Back

N: 30.4% S: 69.6%.

Front

How many bonds are formed in the model of the compound and what type of bond is formed?

Back

4 bonds; covalent.

Front

Why do elements bond?

Back

To become stable and lower energy.

Front

A __________ is a subatomic particle with a positive charge.

Back

Proton.

Front

What is the definition of a covalent bond?

Back

A chemical bond formed by the sharing of electron pairs between atoms.

Front

What is the definition of an ionic bond?

Back

A chemical bond formed between two ions with opposite charges.

Front

What is the role of valence electrons in bonding?

Back

Valence electrons are involved in forming bonds between atoms.

Front

What is the octet rule?

Back

Atoms tend to bond in such a way that they have eight electrons in their valence shell.

Front

What is the difference between an element and a compound?

Back

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