Chemistry Concepts

Atom

• A positively charged particle in the nucleus

• The basic building block of matter

• A negatively charged particle orbiting the nucleus

• A particle with no charge in the nucleus

Tags

NGSS.MS-PS1-1

Subatomic Particle:

• A combination of two or more atoms

• Anything that has mass and occupies space

• A particle smaller than an atom

• A pure substance made of only one type of atom

Proton

• A neutrally charged particle in the nucleus

• A negatively charged particle orbiting the nucleus

• A positively charged particle in the nucleus

• Located in the electron cloud

Neutron

• Found in the electron cloud

• Positively charged particle in the nucleus

• Negatively charged particle orbiting the nucleus

• Neutrally charged particle in the nucleus

Electron

• Found in the nucleus with a positive charge

• Found in the nucleus with no charge

• Negatively charged particle orbiting the nucleus

• A fundamental part of a compound

Tags

NGSS.MS-PS2-3

Electron Cloud

• The dense, positively charged center of an atom

• The path electrons take around the nucleus

• The region surrounding the nucleus where electrons are likely to be found

• Another name for the nucleus

Nucleus

• The negatively charged outer region of an atom

• The region where electrons are constantly moving

• The dense, positively charged center of an atom

• The space occupied by the electron cloud

Atomic Number

• The average mass of an atom

• The number of neutrons in an atom's nucleus

• The number of protons in an atom's nucleus

• Always a whole number

Atomic Mass

• Equal to the number of protons in an atom

• The number of electrons in an atom

• The average mass of an atom, roughly the sum of protons and neutrons

• Always a whole number

Tags

NGSS.MS-PS1-5

Matter

• A pure substance with a fixed composition

• Anything that has mass and occupies space

• A combination of substances chemically bonded

• Energy that has no mass

Tags

NGSS.MS-PS1-4