Topic 3 - Compounds Form According to a Set of Rules

Question 1

What is a compound?

Answer 1

Created when two or more elements combine chemically to produce a new substance.

Question 2

What is chemical formula?

Answer 2

Specifies which elements and how many of each are in a compound.

Question 3

What did Guyton de Morveau create?

Answer 3

He created a naming system for chemicals, The metallic element name is written first followed by the non-metallic elements.

Question 4

What is an ionic compound?

Answer 4

Pure substances created as an outcome of the attracction between particles of opposite charrges which are called ions.

Question 5

What is a polyatomic ion?

Answer 5

It means few ions can also create when certain atoms of elements combine.

Question 6

How do you name ionic compounds?

Answer 6

1. Use the full name of the metal on first.
2. Put the name of the non-metal last and change ending to -ide.
3. If anion a polyatomic ion the name is not changed.
4. If the cation has more than 1 positive charge, specify which ion is being used with roman numerals.

Question 7

What is a molecular compound?

Answer 7

When non-metals merge or combine.

Question 8

What are some properties of molecular compounds?

Answer 8

Low melting & boiling poiints
They are poor conductors of electricity however good insulators
They can be solids, liquids, gases at room temperature

Question 9

What do you do when naming molecular compounds?

Answer 9

• Use the full name of the first element and the most metal-like goes first
• Put name of the second element last and change the ending to ide.
  Use correct prefixes.
  1. mono
  2. di
  3. tri
  4. tetra
  5. penta
  6. hexa
  7. hepta
  8. octa
  9 nona
  10. deca