Chapter 3: Chemical Bonding

Question 1

What are elements?

Answer 1

A substance that can’t be further divided into simpler substances by chemical methods; all the atoms of an element contain the same number of protons.

Question 2

What are elements essentially divided into

Answer 2

Metals and non-metals

Question 3

What class of chemical elements is know to be a good conductor of heat and electricity?

Answer 3

Metals

Question 4

What are compounds?

Answer 4

A substance formed by the chemical combination of two or more elements in fixed proportions.

Question 5

True or false?
When different elements react together to form a compound, their characteristics combine and the compound will have characteristics the same as the elements that formed it.

Answer 5

False, when different elements react together to form a compound, their characteristic properties are lost

Question 6

Give an example of a compound with extremely different characteristic properties than its elements that formed it:

Answer 6

NaCl:

-Na:
-Highly reactive metal
-Fizzes violently in contact with water and can even cause a flame in this reaction
-Cl:
-Toxic gas that was used as a chemical weapon
-Used to kill harmful microbes in water treatment
-NaCl:
-Crystalline solid
-Harmless enough to be used to flavour food
-Essential for life

(NEVER write in bullet points unless asked to)