Oct 23 & Oct 24QUIZ: Monoatomic IonsStarts 2 minutes after bell ringYou have 7 minutes to do it

Warm-up # 7: Atomic/Mass/Number

What’s the a) atomic mass, b) mass number , c) atomic number, d) number of protons, e) neutrons, f) electrons, and g) charge of the following elements?

1) Oxygen-17; an oxide2) Mg-26; a magnesium ion3) An element with 10 p+, 12 n0 and 10 e-

4) W-183; an atom

5) Element symbol for the element between platinum and mercury. What’s its atomic number? Atomic mass? Round its atomic mass to 3 digits.

Check your answers to page 5

FINISH Lab - Petri Dish Atoms Activity

• Complete ALL the petri dishes (only #5 should be empty)

• Answer the follow up questions

• Remember isotope notation looks like this:

K4019

Mass number of this atom

Atomic number of this atomSymbol of this element

Ion charge, if it is not zero+1

Follow Up Questions(you can do these at the bottoms of page 4)

1. List any atoms you found that were anions.2. List any atoms you found that were cations.3. List any atoms you found that were heavy isotopes.4. List any atoms you found that were light isotopes.

Isotope notation looks like this:

KHeavy isotopes are 1 AMU or more than the average atomic mass.Light isotopes are 1 AMU or less than the average atomic mass.

4019

Mass number of this atom

Atomic number of this atomSymbol of this element

Ion charge, if it is not zero+1

Petri Dishes Discussion

Homework

0Sapling #1—due Friday at 11:59PM0Sapling #2—due Tuesday at 11:59PM

0Quiz: Monatomic Ions on Tuesday 10/280Test: Thursday 10/30