UNIT 2 - Elements

Question 1

What are elements?

Answer 1

The building blocks of matter

Question 2

What is the purpose of chemical symbols?

Answer 2

To describe all elements using letters from their Greek or Latin names

Question 3

How is each element represented in terms of chemical symbols?

Answer 3

By the first letter of its name or by the first two letters of its name

Question 4

What is the format for writing chemical symbols?

Answer 4

The first letter is capitalized and the second letter is lowercase

Question 5

What are physical properties of elements?

Answer 5

The appearance of a substance (e.g., colour)

Question 6

What are chemical properties of elements?

Answer 6

Substance’s ability to chemically react with other substances to form new products

Question 7

What are the two main classifications of elements?

Answer 7

Metals and Non-metals

Question 8

What properties do metals typically have?

Answer 8

• Lustre: Shiny
• Malleability: Malleable
• Ductility: Ductile
• Conductibility: Good conductors of heat and electricity
• State: Solid at room temperature (except mercury)
• Density: Usually denser than nonmetals
• Reactivity: Active metals react with acid, and very active metals react with water

Question 9

What properties do non-metals typically have?

Answer 9

• Lustre: Dull
• Malleability: Likely to be brittle or shatter when struck
• Boiling and melting point: Usually lower than metals
• State: Often gases at room temperature
• Conductibility: Poor conductors of heat and electricity

Question 10

What are semimetals/metalloids?

Answer 10

Elements that share some properties with metals and some properties of nonmetals

Question 11

What properties do semimetals/metalloids typically have?

Answer 11

• Lustre: Shiny
• State: Solid at room temperature
• Conductibility: Poor conductors of heat
• Ductility/Malleability: Likely to be brittle or shatter when struck

Question 12

Fill in the blank: The first letter of a chemical symbol is always _______ and the second letter is _______.

Answer 12

capitalized, lowercase

Question 13

True or False: Most elements are non-metals.

Answer 13

False