1.2

Question 1

Element

Answer 1

a pure substance that cannot be broken down into any simpler substances

Question 2

Compound

Answer 2

any substance that is formed by the chemical combination of two or more elements

Question 3

Atom

Answer 3

the smallest unit of an element

Question 4

Proton

Answer 4

a partials in the nucleus of an atom that carries one unit of positive electric charge

Question 5

Neutron

Answer 5

a particle in the nucleus of an atom that has no net electric charge

Question 6

Electron

Answer 6

a particle in the space outside the nucleus of an atom that carries one unit of negative electric charge

Question 7

Nucleus

Answer 7

a dense structure inside the cell

Question 8

Molecule

Answer 8

a particle that contains more then one atom joined together