Chemistry Quiz

Question 1

Drawing Bohr diagram

Transferring elections

Answer 1

1. Convert to binary formula
2. Draw the atoms needed
3. Bracket each atom diagram and write the charge
4. Transfer electrons drawing arrows

Question 2

Difference between
Ionic
Molecular
Polyatomic’s

Answer 2

Ionic: it is a metal and non metal combined by 1 or more negative or positive charged ions
Metal lose electron to non metal Transferring elections
Conduct electricity

Molecular: is a combination of non metals sharing electrons by cola vent bonding creating pure substance
Do not conduct electricity

Polyatomic’s: an ion in a group of atoms of different elements acting as a single ion

Question 3

• How to write ionic formula
• name compound
• name multivalvent
• write Polyatomic formula

Answer 3

1. Write 2 element symbol
2. Write each charge
   3 criss cross charges
3. Reduce charges

•name compound
Metal first then non metal
Ending changes to “Ide”
Ex: bromine-bromide

•multivalent

• Cr2O3
• chromium is multivalent so chromium III oxide

•Polyatomic’s
-remember to criss cross charges and put bracket on the polyatomic
Ex: Mg has charge of 2 OH-
Mg(OH)2

Question 4

Name molecular compound

Answer 4

• use Greek # hexa, tetra penta, ending “ide”
• no charges are criss crossing

Ex: SF4= sulphur tetrafluoride

Question 5

Anion

Cation

Answer 5

Anion: is negative
Cation: positive