8.PS1.1 Atoms Vocabulary Flashcards

Vocabulary flashcards covering key physical science terms and definitions related to 8.PS1.1 Atoms.

atom

the tiny building block of matter

matter

anything that has mass and takes up space

element

a pure substance made of one kind of atom

molecule

two or more atoms bonded together

compound

substance made of two or more different elements bonded together

particle

a tiny piece of matter

proton

positive particle in the atom’s nucleus

neutron

neutral particle in the atom’s nucleus

electron

negative particle moving around the nucleus

nucleus

center of an atom

charge

positive, negative, or neutral electrical property

atomic number

number of protons in an atom

mass number

protons plus neutrons

periodic table

chart that organizes elements

chemical symbol

short letters for an element

pure substance

matter made of only one type of substance

mixture

two or more substances physically combined

bond

force holding atoms together

model

a simple representation of something

scale

size relationship between a model and real object