CHEMICAL AND PHYSICAL CHANGE

Question 1

What is matter?

Answer 1

made and composed of atoms; needs to have mass and volume

Question 2

What are atoms?

Answer 2

smallest part of a chemical element

Question 3

atomic structure

Answer 3

atoms made up of a central nucleus

Question 4

positive in charge

Answer 4

PROTONS

Question 5

negative in charge

Answer 5

ELECTRONS

Question 6

neutral in charge

Answer 6

NEUTRONS

Question 7

What are elements?

Answer 7

one type of atom; simplest substance… atoms in elements are identical

Question 8

What is on the periodic table

Answer 8

an arrangement of elements

Question 9

What is a compound

Answer 9

When two or more elements are chemically bonded together

Question 10

hydrogen + oxygen = water

Answer 10

reactant + reactant = product

Question 11

chemical equation for water

Answer 11

H2 + O2 = H20

Question 12

Forumla

Answer 12

carbon dioxide formula = C02

Question 13

What are molecules?

Answer 13

a small group of atoms that are chemically bonded together.

Question 14

Example of Molecules

Answer 14

O2 or CO2 or H2O

Question 15

What is a mixture?

Answer 15

Two or more substances that are mixed together but not chemically bonded.

Question 16

Example of a mixture

Answer 16

spaghetti Bolognese, sand in water etc.