Lesson 1: Safety in the Laboratory

Question 1

Lab Safety Rules 1-5

Answer 1

1. Read all written instructions
2. Listen to all instruction and follow carefully
3. Wash your hands
4. Wear PPE
5. Be careful when touching equipment or chemicals

Question 2

Lab Safety Rules 6-10

Answer 2

6. Smell a substance by wafting smell towards you
7. Do not taste anything
8. Never pour chemicals into containers held by your hand
9. Clean up spilled chemicals immediately as instructed
10. Tie back loose hair and roll back sleeves

Question 3

Lab Safety Rules 11-15

Answer 3

11. Look through test tubes and containers from the sides
12. Get rid of broken glass properly
13. Label any container you put chemicals in
14. Report any accidents or spills to instructor
15. Pay attention to WHMIS Safety symbols on chemicals

Question 4

John Dalton

Answer 4

• Created Ballard Ball atomic model

Question 5

Billiard Ball Model

Answer 5

1. All mater is made up of atoms
2. All atoms of an element are identical
3. Atoms of different elements have different properties
4. Atoms of different elements can combine to form compounds

Question 6

J.J. Thompson

Answer 6

• Created chocolate chip cookie or plum pudding atomic model

Question 7

Chocolate Chip Cookie Atomic Model

Answer 7

1. Atoms are made of smaller subatomic particles which from to create different elements
2. An atom is a sphere of positive charges with negative charges imbedded
3. Negatively charged particles are called electrons

Question 8

Ernest Rutherford

Answer 8

• Created the Planetary Atomic Model

Question 9

Planetary Atomic Model

Answer 9

1. An atom is made up of mainly empty space
2. Each atom contains a dense positive core called a nucleus

Question 10

Neils Bohr

Answer 10

• Created the Bohr Atoms Model

Question 11

Bohr Atomic Model

Answer 11

• Electrons surround nucleus in specific energy levels
• Light is released from hydrogen atoms

Question 12

The Quantum Mechanical Model of the Atom

Answer 12

1. Each electron is a “cloud” of negative charge
2. Electrons occupy all the space at different energy levels
3. Electron clouds surround the nucleus which contains nucleons (protons and neutrons)

Question 13

What are the three classes of elements?

Answer 13

1. Metals
2. Non-Metals
3. Metalloids

Question 14

Metals

Answer 14

• Left side of the table
• Groups 1-11

Question 15

What are the properties of metals?

Answer 15

• Conducts that and electricity
• Ductile and malleable
• Solid at room temp (mercury)

Question 16

Non-Metals

Answer 16

• Right side of the table
• Not very similar to each other

Question 17

Metalloids

Answer 17

• On the staircase of the table
• Share properties of metals and non metals

Question 18

Atomic Number

Answer 18

Equal to number of protons in the nucleus

Question 19

Mass Number

Answer 19

• Number of protons and neutrons in an element

Question 20

Isotopes

Answer 20

• Atoms with the same element but different number of neutrons