chemical and matter formulae

how many types are there in a pure substance? and what?

• 3-compounds, atom, mixtures

• 2-compounds and elements

• 3-compounds,atom, elements

you can never change subscript of balanced equation

• false

• true

you can only add coefficients?

• true

• false

molecules of a elements contain_____________

• 4/more elements

• 3/more compounds

• 2/more same atoms.

what are subatomic particles?

• compounds are made of smaller particles called subatomic particles

• atoms are made of smaller particles called subatomic particles

• none

• molecules are made of smaller particles called subatomic particles

center part of atom is __________________

• nucleus

• membrane

• exo-atom

• none

what is molecules ?

• all

• made up of 2/more atoms

• 2/more chemicals

• none

what is ion?

• all

• none

• is a charged particles formed by a atom by loss/gain of nucleus

• is a charged particles formed by a atom by loss/gain of electron

how many types are there in mixture?

• 2-homogenous, heterogenous

• all

• 2-compound, and elements

• none

what are compounds made up of ?

• made of no elements

• made of 1 atom

• made up of different types of atoms

• none