7th grade unit 7 lessons 1-5 vocabulary

a change of matter form one form to another without a change in chemical properties

• physical change

• law of conservation of mass

• chemical change

the law that state that mass cannot be created or destroyed in ordinary chemical and physical changes

• physical change

• law of conservation of mass

• chemical change

a change that occurs when one or more substances change into entirely ew substances with different properties

• physical change

• law of conservation of mass

• chemical change

the smallest unit of an element that maintains the properties of that element

• atom

• neutron

• neucleus

• proton

a subatomic particle that has no charge and that is located in the nucleus of an atom

• nucleus

• electron

• neutron

• proton

an atom's central region, which is made up of protons and neutrons

• proton

• nucleus

• neutron

• electron

the number of protons in the nucleus of an atom

• proton

• electron cloud

• mass number

• atomic number

a subatomic particle that has a positive charge and that is located in the nucleus of an atom

• proton

• neutron

• nucleus

• mass number

a subatomic particle that has a negative charge

• electron cloud

• electron

• mass number

• atomic number

a region around the nucleus of an atom where electrons are likely to be found

• electron cloud

• mass number

• atomic number

• nucleus