2.2 Elements and Compounds

Question 1

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

Answer 1

element

Question 2

any substance that is formed by the chemical combination of two or more elements and acts like a single substance.

Answer 2

compound

Question 3

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

Answer 3

atom

Question 4

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

Answer 4

proton

Question 5

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

Answer 5

neutron

Question 6

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

Answer 6

electron

Question 7

a dense structure inside the cell one of the airborne dust particles around which water condenses as droplets or ice crystals before falling as precipitation an atoms dense center where most of it’s mass is.

Answer 7

nucleus

Question 8

a particle that contains more then one atom joined together.

Answer 8

molecule

Question 9

a way to write a compound’s name using symbols. the letters tell what elements are in the compound and the number of particles in the compound.

Answer 9

chemical formula

Question 10

a thing that represents or stands for something else especially a material object representing something abstrack.

Answer 10

symbol