Today we will…Review last night’s homework
Take a daily Quiz
Continue learning about ionic compounds.
Homework3. What family of elements is
relatively unreactive, and why?
The noble gasses, group 18, because they have completely full or empty shells and their charges are neutral.
Homework4. Describe the formation of both
positive and negative ions.
Positive ions form when atoms lose electrons.
Negative ions form when atoms gain electrons.
(An electron has a negative charge.)
Homework5. Predict the change that must
occur in the electron configuration if each of the following atoms is to achieve a noble gas configuration.
Homework6. Draw models to represent the
formation of the positive calcium ion and the negative bromide ion.
Daily Quiz
1. Of the following elements, which is the least reactive?
A. Lithium (Li)
B. Boron (B)
C. Carbon (C)
D. Oxygen (O)
E. Neon (Ne)
Daily Quiz
2. This dot diagram could represent which of the following elements?
A. Lithium (Li)
B. Boron (B)
C. Carbon (C)
D. Oxygen (O)
E. Neon (Ne)
X
Daily Quiz
4. Oxygen could form an ionic bond with which of the following elements?
A. Lithium (Li)
B. Carbon (C)
C. Nitrogen (N)
D. Fluorine (F)
E. Neon (Ne) .
Daily Quiz
1. Of the following elements, which is the least reactive?
A. Lithium (Li)
B. Boron (B)
C. Carbon (C)
D. Oxygen (O)
E. Neon (Ne)
Daily Quiz
1. Of the following elements, which is the least reactive?
A. Lithium (Li)
B. Boron (B)
C. Carbon (C)
D. Oxygen (O)
E. Neon (Ne)
Daily Quiz
2. This dot diagram could represent which of the following elements?
A. Lithium (Li)
B. Boron (B)
C. Carbon (C)
D. Oxygen (O)
E. Neon (Ne)
X
Daily Quiz
2. This dot diagram could represent which of the following elements?
A. Lithium (Li)
B. Boron (B)
C. Carbon (C)
D. Oxygen (O)
E. Neon (Ne)
X
Daily Quiz
4. Oxygen could form an ionic bond with which of the following elements?
A. Lithium (Li)
B. Carbon (C)
C. Nitrogen (N)
D. Fluorine (F)
E. Neon (Ne)
Daily Quiz
4. Oxygen could form an ionic bond with which of the following elements?
A. Lithium (Li)
B. Carbon (C)
C. Nitrogen (N)
D. Fluorine (F)
E. Neon (Ne) .
cation positively charged ion
anion negatively charged ion
Cats have a positive impact on your life.
cation positively charged ion
anion negatively charged ion
Ants have a negative impact on your life.
formula unit the ratio of elements in an ionic compound
Technically, this is one molecule of salt.
It has the formula:
Na95238507751895434357094Cl95238507751895434357094
formula unit the ratio of elements in an ionic compound
Technically, this is one molecule of salt.
It has the formula:
Na95238507751895434357094Cl95238507751895434357094
But we will just call it NaCl.
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
1. Find the charges.
Ba N
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
1. Find the charges.
Ba+2 N-3
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
2. Find the least common multiple.
Ba+2 N-3
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
2. Find the least common multiple.
Ba+2 N-3
2 x 3 = 6
Six electrons were transferred.
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
2. Find the least common multiple.
Ba+2 N-3
It takes 3 bariums to provide 6 electrons.
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
2. Find the least common multiple.
Ba+2 N-3
It takes 2 nitrides to
accept 6 electrons.
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
2. Find the least common multiple.
Ba3N2
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
3. The overall charge should be zero.
Ba3N2
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
3. The overall charge should be zero.
Ba3N2
Check your work.
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
3. The overall charge should be zero.
Ba3N2
Check your work.
3(+2) + 2(-3) = 0
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
The quick way:
Ba+2 N-3
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
The quick way:
Ba+2 N-3
Swap the numbers
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
The quick way:
Ba3 N2
Swap the numbers
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
The quick way:
Ba3 N2
Swap the numbers
What if the charges don’t balance?
What would be the formula for BARIUM NITRIDE?
The quick way:
Ba3N2
Swap the numbers