Chemistry Final Exam

Front

What is the mass of 5 moles of Fe₂O₃?

Back

798.5 g

Front

How is an ionic bond formed?

Back

Transfer of electrons

Front

How many protons are there in an atom with a mass number of 40 and 20 neutrons?

Back

20

Front

The period for Bromine is ___________.

Back

4

Front

The chemical bond formed when two atoms share electrons is called a(n) _______.

Back

Covalent bond

Front

What is the molar mass of Fe₂O₃?

Back

159.69 g/mol

Front

Define a covalent bond.

Back

A chemical bond formed by the sharing of electrons between atoms.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the formula to calculate the number of protons in an atom?

Back

Number of protons = Mass number - Number of neutrons.

Front

What is the significance of the period number in the periodic table?

Back

It indicates the highest energy level of electrons in the atoms of that period.