Bohr And Lewis Diagram /ionic Compounds/multivalent Elements

Question 1

What is a Bohr Diagram?

Answer 1

A Bohr Diagram shows how many electrons an atom/element has in each energy level/shell.

Question 2

How many electrons can each shell hold?

Answer 2

1st shell can hold 2
2nd shell…can hold 8
3rd shell …can hold 8

Question 3

Valence Shell

Answer 3

The outermost shell that contains electrons

Question 4

Stable Octet

Answer 4

A full outer shell of 8 electrons

Question 5

Valence Electrons

Answer 5

An electron in the valence shell
(These are e- involved in chemical bonding)

Question 6

Lewis Diagrams

Answer 6

An easier method of showing chemical bonding

Question 7

What does a Lewis Diagram show?

Answer 7

How many valence electron an atom has and how they’ve been grouped

Question 8

Grouping electrons

Answer 8

Once there are more than 4 e-, they start to “buddy up”.

Question 9

Things to notice:
I am an atom with 1 valence electron. Can you tell what group I’m in?

Answer 9

Group 1
Alkali Metals

Question 10

Think, Pair, Share: I am an atom with 2 electron shells. Can you tell what period I’m in?

Answer 10

Yes,
Period 2

Question 11

Forming compounds:
What happens when atoms move close together?

Answer 11

Their valence electrons interact

Question 12

Atoms want to become stable by having a full valence shell. How does that happen?

Answer 12

Atoms will often try to gain or lose electrons to achieve this -turning them into IONS.

Question 13

What is an ION?

Answer 13

An atom with a net electric charge.
A cation has a positive charge
An anion has a negative charge

Question 14

What are the two main types of chemical bonding?

Answer 14

1. Ionic Bonding - electrons are transferred between atoms.
   Example: Na + Cl = NaCl
2. Covalent Bonding - electrons are shared between atoms.

Question 15

Atoms vs molecules vs Compounds
Atoms are…

Answer 15

Atoms are the smallest possible pieces of an element
Example: an atom of calcium (Ca)

Question 16

Atoms vs Molecules vs Compounds
Molecules are…

Answer 16

Groups of 2 or more atoms stuck together.

Question 17

Atoms vs Molecules vs Compounds
Compounds are…

Answer 17

Compounds are materials composed of groups of different atoms.
Some molecules are compounds

Question 18

What is an Ion charge?

Answer 18

Ion charge : the charge an atom will have once it becomes an ion.

Question 19

Naming Ionic Compunds
What is the rule for naming ionic compunds?

Answer 19

(Cation ) + (anion with “ide” suffix)

Question 20

What are Multivalent Elements?

Answer 20

More than one Ion charge.
Examples: manganese
Uranium

Question 21

If one element can form more than one type of ion, how are we to know which one to choose?

Answer 21

We use Roman numerals

Question 22

What are Polyatomic Ions?

Answer 22

1. Charged molecule. In other words, they’re ions made up of more then 1 atom
2. They cannot exist on their own