Atomic theory and Atoms

Front

Subatomic particles with a negative charge

Back

Electrons

Front

Subatomic particles with a positive charge

Back

protons

Front

Weighted average of isotopes' masses of an element.

Back

Atomic Mass

Answer explanation

The atomic mass of an element is the weighted average of the masses of its isotopes, reflecting their relative abundances. This distinguishes it from atomic number, which counts protons, and mass number, which counts protons and neutrons.

Front

The number of protons in an element

Back

Atomic Number

Front

Subatomic particles with no charge

Back

Neutrons

Front

Smallest particle of an element showing its properties.

Back

Atom

Front

Dense, positively charged part of an atom holding most mass

Back

Nucleus

Front

Location of electrons around the nucleus

Back

Electron Cloud/levels

Front

Arrangement of elements by atomic number

Back

Periodic Table

Front

Nucleus of an atom contains:

Back

Protons and neutrons