2.1 Vocabulary

Front

Central part of an atom where protons and neutrons are located

Back

nucleus

Front

a weak interaction that occurs when there is a slight attraction of molecules

Back

van der Waals forces

Front

Positively charged subatomic particle found in the nucleus

Back

protons

Front

positively or negatively charged atoms

Back

ions

Front

Number of protons and neutrons in the nucleus of an atom

Back

atomic mass

Front

Substance formed by the chemical combination of two or more elements

Back

compound

Front

Forces that hold atoms of elements together

Back

chemical bond

Front

Negatively charged subatomic particle that orbits around the nucleus

Back

electron

Front

Basic unit of matter

Back

atom

Front

Neutral charged subatomic particle bound to protons in the nucleus

Back

neutron