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Electrons… . Mrs. Vindi’s Students are Awesome!. Quick Review - Protons . Yesterday we talked about finding Proton Remember Protons are Positive Turn to your partner and tell them how to find Protons…. P+. Protons = Atomic Number. Quick Review - Neutrons .

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electrons

Electrons…

Mrs. Vindi’s Students are Awesome!

quick review protons
Quick Review - Protons
  • Yesterday we talked about finding Proton
  • Remember Protons are Positive
  • Turn to your partner and tell them how to find Protons…

P+

quick review neutrons
Quick Review - Neutrons
  • Yesterday we talked about finding Neutrons
  • Remember NEUTRons are NEUTRal
  • Turn to your partner and tell them how to find Protons…

N

are you ready for some electrons
Are you ready for some Electrons?
  • Don’t say No-I know you can do it!
  • Electrons are Tricky.
  • First of all – remember what the charge is on an electron?
  • NEGATIVE!!!
balancing charges
Balancing Charges

We’ve learned that Protons are Positive and Electrons are Negative.

The result is that Protons and Electrons exist in a “Tug-O-War” for control of the charge of the atom.

Imagine you had two protons (2 + Charges)

Imagine there was 1 electron (1 -)

The result is the atom would have a charge of +1

let s practice
Let’s Practice…
  • Atom #1 has
  • 4 Protons
  • 3 Electrons
  • What’s it’s charge???
let s practice1
Let’s Practice…
  • Atom #2 has
  • 4 Protons
  • 5 Electrons
  • What’s it’s charge???
let s practice2
Let’s Practice…
  • Atom #3 has
  • 4 Protons
  • 4 Electrons
  • What’s it’s charge???
slide11

Elements Name:

# protons:

# Neutrons:

# electrons:

Mass:

Charge:

_

+ + +

OOOO

_

-

slide12

Elements Name:

# protons:

# Neutrons:

# electrons:

Mass:

Charge:

+ = 8

O = 8

-

slide13

Elements Name:

# protons:

# Neutrons:

# electrons:

Mass:

Charge:

+ = 18

O = 22

-

okay now comes the hard part
Okay-Now comes the HARD part…
  • Imagine you have to calculate electrons for an Oxygen atom with a charge of -2?
oxygen 2
Oxygen (-2)
  • ?: Step #1 – Calculate your Protons
  • A: Oxygen has 8 protons!
  • ?: Step #2 – Ask if your charge is Positive or Negative?
  • A: Negative
  • ?Step#3 – If the charge is negative-add the number of your charge to protons to get electrons
  • A 8+2 = 10 electrons!
okay now comes the hard part1
Okay-Now comes the HARD part…
  • Imagine you have to calculate electrons for an Oxygen atom with a charge of +2?
oxygen 21
Oxygen (+2)
  • ?: Step #1 – Calculate your Protons
  • A: Oxygen has 8 protons!
  • ?: Step #2 – Ask if your charge is Positive or Negative?
  • A: Positive
  • ?Step#3 – If the charge is positive-subtract the number of your charge to protons to get electrons
  • A 8 -2 = 6 electrons!