Atoms & Elements

Question 1

What does WHMIS stand for?

Answer 1

Workplace Hazardous Materials Information System

Question 2

What are 3 things you would find on an SDS sheet (other than the name)?

Answer 2

Composition, Hazardous identification, First-aid measures

Question 3

Define: Matter, Mass, Volume

Answer 3

Matter is anything that takes up space and can be weighed. Mass is the amount of matter within a given object. Volume is the amount of space occupied by any 3D object.

Question 4

What are the 3 states of matter?

Answer 4

Solid, liquid, gas

Question 5

List the following as either matter or not matter: Gravity, copper, oxygen, water, light, heat.

Answer 5

No, yes, yes, yes, no, no.

Question 6

Explain what the theories, models and laws are in science.

Answer 6

A law is a generalized description of some aspect of the physical world under certain conditions. A theory is a generalized explanation of a set of related observations or events supported by research and good arguments; they are used to explain laws. A model is used to represent and explain observed phenomena.

Question 7

What is the definition of an atom?

Answer 7

The smallest part of an element that has all of the element’s properties

Question 8

What are the points of the atomic theory?

Answer 8

• All matter is made up of atoms
• Atoms of an element are alike but different from atoms of other elements
• Atoms can combine to form molecules
• Atoms can’t be destroyed by chemical means

Question 9

Describe the 3 main particles that make up an atom

Answer 9

Proton (positive, in nucleus, heavy)
Neutron (neutral, in nucleus, heavy)
Electron (negative, outside nucleus, light)

Question 11

What are Physical and Chemical changes?

Answer 11

• Physical Change: No new substance is produced even though the appearance or state may change
• Chemical Change: A new substance with different properties is produced.