Atomic Structure Vocab

Electrons are particles, that have a Negative charge. They are found in the electron cloud outside the nucleus and have very little mass.

• atoms

• peanut butter and jelly

• valence

• nucleus

a __________ is when the electron cloud is found outside the nucleus of the atom and is the location of all electrons in the atom.

The atomic number tells the number of protons in an atom, and the number of protons determines the identity of the atom, or which element it is.

• Nucleus

• Atomic mass

• None of these

• Crayola Crayons

Neutrons are particles that are neutral, meaning they have no charge. They are also found in the nucleus and have a mass of 1 amu.

• Electron Cloud

• Electron

• Atomic Number

• All of the above

Valence electrons are found in the outer energy level of the atom and determines chemical _________, like reactivity, or how the atom reacts and forms bonds with other atoms.

• properties

• inner

The nucleus is located in the ______ of the atom and contains _____ and _______.

Protons are particles that have a ______ charge. They are found in the nucleus and have a mass of 1 amu OR atomic mass unit.

The atomic mass is made up of the number of protons plus the number of neutrons. The atomic mass on the periodic table is the avergae mass of atoms of that element found in nature.

• Particles

• weight

• Atomic Number

• mass

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