Elements and compounds

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 and acts like a single substance

Question 3

atom

Answer 3

the smallest unit of an element that retains the properties of that element.

Question 4

proton

Answer 4

a particle in the nucleus of an atom that carries one unite of positive electric charge

Question 5

neutron

Answer 5

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

Question 6

electron

Answer 6

a particle in the space outside of 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 than one atom joined together