P.S. ch4 vocab atoms

Neutron's job/responsibility

• Holds the nucleus together

• Transports electrons

• Facilitates chemical reactions

• Generates energy in the cell

Proton is found...

• inside the nucleus

• outside the nucleus

• in the electron cloud

• in the neutron star

Proton

• negatively charged subatomic particle

• neutral subatomic particle

• positively charged subatomic particle

• subatomic particle with no charge

Atomic number

• the number of protons in the nucleus of an atom

• the total number of electrons in an atom

• the sum of protons and neutrons in an atom

• the number of neutrons in the nucleus of an atom

Rutherford model of the atom

• Cherry pit model (found nucleus)

• Plum pudding model (no nucleus)

• Solar system model (electrons orbit nucleus)

• Quantum mechanical model (probability clouds)

Dalton model of the atom

• Atoms are indivisible particles that cannot be created or destroyed.

• Atoms are spheres; same type of atoms have the same size, shape, and mass.

• Atoms can change from one element to another during chemical reactions.

• Atoms are made up of smaller particles called protons, neutrons, and electrons.

Anion

• A positively charged ion

• A neutral ion

• A negatively charged ion

• An ion with no charge

Ion

• An atom or group of atoms that has a positive or negative charge.

• A neutral particle with no charge.

• A molecule that contains two or more different elements.

• An atom that has lost or gained neutrons.

To find the number of neutrons...

• mass # - atomic #

• atomic # + mass #

• mass # / atomic #

• mass # x atomic #

Electron's job/responsibility

• Used in chemical bonding/reactions.

• Responsible for the mass of an atom.

• Determines the color of an element.

• Contributes to the gravitational force between atoms.