Topic 4: Classifying Elements

Question 1

Element Symbols

Answer 1

• Represented by letters
  (oxygen = 0, Helium = He)
• Universal (same symbol everywhere in the world)

Question 2

Jons Jacob Berzelius

Answer 2

• Suggested to use letters to represent elements on periodic table

Question 3

Three Groups on Periodic Table

Answer 3

1. Metals
2. Non Metals
3. Metalloids

Question 4

Periodic Table Metal Characteristics

Answer 4

Most metals are:
- Solid at room temperature
- Good conductors of heat and electricity
- Malleable and ductile
- Shiny in appearance

Question 5

Periodic Table Non-Metal Characteristics

Answer 5

Most Non-Metals Are
1. Solids and gases at room temperature (only bromine is a liquid)
2. Poor conductors of heat and electricity
3. Brittle and non ductile
4. Not shiny in appearence

Question 6

Metalloids

Answer 6

• Have properties of both metals and non-metals
• Very few

Question 7

Chemical Family

Answer 7

• Group of elements that have similar properties
  Ex. gold, silver and copper are classified as coinage metals

Question 8

4 Groups in the Periodic Table

Answer 8

1. Alkali Metals
2. Alkaline Earth Metals
3. Hallogens
4. Noble Gases

Question 9

Alkali Metals

Answer 9

• Family 1
• Extremely reactive
• Atoms have an unpaired electron
  Ex. lithium

Question 10

Alkaline Earth Metals

Answer 10

• Fairly reactive
  Ex. calcium

Question 11

Hallogens

Answer 11

• Extremely Reactive
• Found in compounds
• Have an unpaired electron but can gain an electron when joined in a compound
  Ex. iodine

Question 12

Noble Gases

Answer 12

• Unreactive
• Does not have any unpaired electrons
  Ex. Helium