1. P3 Challenge-
Given 11B, determine the number of protons, electrons and neutrons in a neutral atom. Then state the atomic number and the mass number for this isotope.
New Seats
Get out Atoms, Ions and Mass Worksheet Front only for Hmk check
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Front of room

2. Chemistry – Nov 14, 2018 P3 Challenge- Objective –
Given 11B, determine the number of protons, electrons and neutrons in a neutral atom. Then state the atomic number and the mass number for this isotope.
Objective –
Atomic Mass
Beanium Lab Activity
Get out Atoms, Ions and Mass Worksheet Front only for Hmk check

3. Chemistry – Nov 14, 2018 Agenda – Homework Review Atomic Mass
Beanium Lab Activity
Three isotope names of beans are like chocolates: White, Milk, and Dark
Assignment: -
Beanium Lab Activity questions
Complete the Atoms, Ions and Mass worksheet

4. Homework Review Element Symbol Z A #p #n #e charge Oxygen 16O2- 8 1610 2-
Hydrogen 1H 1
3H+ 3 2 +
Carbon
14C 6 14
12C 12
Zinc
65Zn 30 65 35
Potassium
39K+ 19 39 20 18

5. Homework Review Element Symbol Z A #p #n #e charge Titanium 48Ti2+ 2226 20 2+
Antimony
122Sb 51
122 71
Uranium
238U 92
238
146
Silver
108Ag 47
108 61
Fermium
257Fm
100
257
157
Platinum
195Pt 78
195
117
Krypton
84Kr 36 84

6. Atomic Mass Given the symbol m
Average mass of the atom in amu (decimal value)
Weighted average
Each isotope has its own atomic mass
For any sample of an element, the particular isotopes present will reflect to natural abundance of each type of isotope found on earth.

7. Percent Abundance
Percent abundance: given of a sample of 100 atoms, how many will be a given isotope.
Ex: Ne % Ne % Ne %
Each isotope has its own mass: , ,

8. Average Atomic Mass
Atomic Mass on periodic table is a weighted average.
To calculate atomic mass
Let Mn= the mass of isotope n (amu)
Let abn= the relative abundance of isotope n (percent as a decimal)

9. Beanium Lab
Beanium is an element consisting of three kinds of beans (isotopes)
White chocolate beans
Milk chocolate beans
Dark chocolate beans
You will receive a sample of Beanium that is a mixture of isotopes and become a “bean counter”
You will measure the percent abundance of each type of bean and the average mass of each type of bean (% abundance = # white/total # x 100)
You will use this percent abundance and average mass data to calculate the average atomic mass of Beaninum.

10. Exit Slip - Homework Exit Slip:
Clean up your lab space with a zero impact from when you came in. No beans on the floor. Broom and dust pan available.
What’s Due? (Pending assignments to complete.)
Complete Atoms Ions and Mass Worksheet
Beanium Lab Activity questions
What’s Next? (How to prepare for the next day)
Read Holt p