1st Semester Final Practice

Front

What type of compound is CCl4?

Back

CCl4 is a covalent compound.

Front

What is the SI unit for mass?

Back

The SI unit for mass is the kilogram.

Front

Why is the mole used when measuring atoms?

Back

Atoms are extremely tiny particles, and need extremely large quantities to be made visible.

Front

What is a group of a single type of atom called?

Back

A group of a single type of atom is called an element.

Front

Which element has 49 protons and 49 electrons?

Back

Indium (In) has 49 protons and 49 electrons.

Front

What is the definition of a covalent compound?

Back

A covalent compound is a chemical compound formed by the sharing of electrons between atoms.

Front

What is the definition of an ionic compound?

Back

An ionic compound is a chemical compound composed of ions held together by electrostatic forces.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of two or more substances that are not chemically bonded, while a compound is a substance formed when two or more elements are chemically bonded.

Front

What is the formula for calculating the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).