Chemistry Midterm Review

Front

What is the mass number of an atom with 26 protons and 30 neutrons?

Back

The mass number is 56.

Front

What does the octet rule state?

Back

A full outer ring has 8 electrons in the S and P shells.

Front

What is the symbol for a Bromine ion that has gained 1 electron?

Back

Br⁻¹.

Front

What is the name of FeCl₂?

Back

Iron (II) chloride.

Front

What is the correct formula for aluminum phosphate?

Back

AlPO₄.

Front

Define an atom.

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is the difference between an ion and an atom?

Back

An ion is an atom that has gained or lost electrons, resulting in a charge.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and determines the element's identity.

Front

What is a covalent bond?

Back

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

Front

What is the formula for calculating the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Atomic number.