Understanding Elements and Atomic Structure

Front

Elements are pure substances that consist of only one type of atom.

Back

True

Front

Each element is represented by a unique chemical symbol (e.g., H for hydrogen, O for oxygen).

Back

True

Front

Elements are listed on the Periodic Table.

Back

True

Front

Elements can exist as single atoms (e.g., He) or molecules (e.g., O₂).

Back

True

Front

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

Back

True

Front

The atomic mass is the total number of protons and neutrons in an atom.

Back

True

Front

Protons are positively charged particles found in the nucleus of an atom.

Back

True

Front

The number of protons defines the element.

Back

True

Front

Atomic Number = Number of Protons

Back

Atomic Mass = Number of Protons + Number of Neutrons

Front

Number of Neutrons = Atomic Mass - Atomic Number

Back

True