3rd Six Weeks Review

Front

What are the fundamental components of an atom?

Back

Protons, neutrons, and electrons.

Front

What is the chemical formula for ammonia?

Back

NH₃

Front

How many protons and neutrons are in one atom of Pb-208?

Back

82 protons and 126 neutrons.

Front

Which atom has the electron configuration that matches chlorine?

Back

Chlorine.

Front

How do you calculate the average atomic mass of an element with multiple isotopes?

Back

Multiply the mass of each isotope by its relative abundance (as a decimal), then sum the results.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of an electron?

Back

Negative charge.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

Define isotopes.

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the atomic number?

Back

The atomic number determines the identity of an element and is equal to the number of protons in the nucleus.