Elements and compounds

Question 1

elements

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 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 out side 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