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Atom

• The most basic unit of a chemical element

• The largest particle on earth

• A positively charged subatomic particle

• A negatively charged subatomic particle

Tags

NGSS.MS-PS1-1

Atomic Nucleus

• The outer shell of an atom that contains electrons.

• Positively charged subatomic particles.

• The small, dense region at the center of an atom.

• Subatomic Particles with a neutral (no) charge.

Tags

NGSS.MS-PS1-1

Atomic Mass

• The mass of the electron cloud

• The mass of a chemical element (protons + neutrons)

• The small, dense part of an atom.

• The outermost electrons in the electron shell.

Tags

NGSS.MS-PS1-1

Atomic Number

• The number of valence electrons.

• The mass of a chemical element (protons + neutrons).

• Subatomic particles with a neutral (no) charge.

• The number of protons in an atom.

Tags

NGSS.MS-PS1-1

Bohr Model

• A model of the atom that shows the nucleus surrounded by circles that have electrons inside them.

• A model of the nucleus that shows the protons and neutrons only.

• The same thing as the periodic table.

• A model that shows ONLY the amount of protons in an atom.

Tags

NGSS.MS-PS1-1

Electron

• Have a positive charge and are found in the nucleus of an atom.

• Have a neutral (no) charge and are found in the nucleus of an atom.

• Have a negative charge and are found orbiting the nucleus of an atom.

Tags

NGSS.MS-PS1-1

Electron Cloud

• The system of electrons surrounding the nucleus of an atom.

• The positively charged subatomic particles.

• Subatomic particles with a neutral charge.

• The amount of protons in the nucleus of an atom.

Tags

NGSS.MS-PS1-1

Neutron

• Subatomic particle with a positive charge, found in the nucleus of an atom.

• Subatomic particle with a neutral (no) charge, found in the nucleus of an atom.

• Subatomic particle with a neutral (no) charge, found in the electron cloud

Neutral Charge

• Neutrons

• Electrons

• Protons

Negative Charge

• Neutrons

• Electrons

• Protons

Tags

NGSS.MS-PS2-3