atoms and molecules

when positively and negatively charged ions attract each other they form a

• indicator

• neutron

• ionic bond

• covalent bod

atoms share electron in a

• element

• salt

• ionic bond

• covalent bond

a substance that changes color when exposed to acids or bases solutions is called

• salt

• ion

• molecule

• indicator

you can determine the concetration of acids or bases in a solution by using

• a salt

• the ph scale

• the periodic table of elements

• a particle accelerator

a_____________ reaction occurs when a compound is broken down into simpler compounds

• synthesis

• replacement

• decomposition

• combustion

the number of protons plus neutrons is the atoms approximate

• atomic number

• atomic mass

• atomic model

• indicator

the atomic number is based on the number of_ an element

• neutrons

• electrons

• protons

• protons and neutrons