Chapter 6 Chemistry & Chemical Safety

Question 1

Chemistry

Answer 1

Science that deals with the composition structures & properties of matter & how mater changes under different conditions

Question 2

Matter

Answer 2

Substance that occupies space & has mass.
solid, liquid or gas. We can taste, touch , smell
chemical

Question 3

Elements

Answer 3

Simplest form of chemical matter & contains only 1 type of atom.
Cannot be broken down
118 elements
98 on earth

Question 4

Atoms

Answer 4

Basic unit of matter w nucleus at the center surrounded by -charged electrons
Cannot b divided into simpler substances by ordinary chemical means

Question 5

Electrons

Answer 5

move around the nucleus

Question 6

Nucleus Consists of

Answer 6

Protons -Subatomic particles with a + charge
Neutrons - Subatomic Particles with no charge.

Question 7

Neutrons

Question 8

Molecules

Answer 8

Made by combining atoms
Chemical combination of 2 or more atoms in definite proportions
Ex water made from hydrogen atoms & oxygen atoms

Question 9

Elemental molecule

Answer 9

Atmospheric oxygen
molecule containing 2 or more atoms of the same element