Front

What is the atomic mass of an element?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What are the two structures found in the atom's nucleus?

Back

Protons and Neutrons.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the average mass of an atom, while atomic number is the number of protons in the nucleus of an atom.

Front

How can you find the element with a specific number of protons?

Back

You can use the periodic table, where each element is listed with its atomic number, which corresponds to the number of protons.

Front

Which element has an atomic mass of 19?

Back

Fluorine.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number and grouped by similar chemical properties.

Front

What are 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 its position in the periodic table.

Front

What are metals, nonmetals, and metalloids?

Back

Metals are good conductors of heat and electricity, nonmetals are poor conductors, and metalloids have properties of both.