physical science – lecture 37 electron review. review of electrons the number of total electrons...

Physical Science – Lecture 37

Electron Review

Review of Electrons

• The number of total electrons is equal to the atomic number.

• The number of valence electrons is equal to the group number when the element is found (1A=1, 2A=2, 3A=3, 4A=4, 5A=5, 6A=6, 7A=7, 8A=8).

Review of Electron Configuration

• The Large number stands for the shell that an electron is in. Ex) 1s22s22p63s23p64s2

• The superscript stands for the number of electrons in that shell. Ex) 1s22s22p63s23p64s2

• Therefore, there will be ____ electrons in the 1st shell, ____ electrons in the 2nd shell, ____ electrons in the 3rd shell, and _____ electrons in the 4th shell.

Review of Electron Configuration

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Practice – Atomic Number 11

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Practice – Atomic Number 28

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Practice – Atomic Number 38

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Practice – Atomic Number 14

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Practice – Atomic Number 52

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Practice – Atomic Number 47

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Practice – Atomic Number 35

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

Review of Valence Electrons

• 1A = 1 valence electron• 2A = 2 valence electrons• 3A = 3 valence electrons• 4A = 4 valence electrons• 5A = 5 valence electrons• 6A = 6 valence electrons• 7A = 7 valence electrons• 8A = 8 valence electrons

Group Numbers are Labeled1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in Cl?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in Te?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in Mg?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in Ba?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in C?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in Br?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in Be?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in K?1A

2A 7A6A

8A

5A4A3A

How many valence electrons are in Ge?1A

2A 7A6A

8A

5A4A3A

Review of Electron Dot Structures(1A) (2A) (3A) (4A) (5A) (6A) (7A) (8A)

Practice

B

Practice

F

Practice

C

Practice

P

Practice

Be

Practice

K

Practice

S

Practice

Al

Practice

Ne

Pop Quiz

1. How many total electrons does copper have if its atomic number is

29 and it’s mass number is 64?

2. What is the electron configuration for Chlorine – Atomic number 17?

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

3. Draw the electrons in their correct shells - Atomic Number 23

•Each s gets 2 electrons.•Each p gets 6 electrons.•Each d gets 10 electrons.•Each f gets 14 electrons.•Add up the total number of subscripts to determine how many electrons you have.

4. How many valence electrons are in Br?1A

2A 7A6A

8A

5A4A3A

5. Draw the electron dot structure for Ar

Ar

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