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Atomic Structure

Teacher: Sara Knowles
Across
The number of protons in the nucleus of one atom of an element.
The negatively charged subatomic particle. Found outside the nucleus.
The tiny, dense central portion of the atom.
A particle much smaller than an atom.
1/12 the mass of a single carbon-12 atom.
The smallest particle of an element that retains its identity in a chemical reaction.
Down
The electrons in the outer shell of an atom. These are the electrons that are used during bonding.
The subatomic particle with no charge. Found in the nucleus.
Electrons in the inner shells. These electrons are not involved in bonding.
The positively charged subatomic particle. Found in the nucleus.
The mass of an atomic particle, subatomic particle, or molecule.