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.

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Presentation transcript:

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 Zoe Jyanna Maclean Chiara Jada Trvaughn Tynira Angela Candace Benjamin Janie Lena Kennidi William Shania Erica Jordyn Indigo Andrea Jana Abby Locke Sam Comfort Danna Jesus Zofie Front of room

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

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

Homework Review Element Symbol Z A #p #n #e charge Oxygen 16O2- 8 16 10 2- Hydrogen 1H 1 3H+ 3 2 + Carbon 14C 6 14 12C 12 Zinc 65Zn 30 65 35 Potassium 39K+ 19 39 20 18

Homework Review Element Symbol Z A #p #n #e charge Titanium 48Ti2+ 22 26 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

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.

Percent Abundance Percent abundance: given of a sample of 100 atoms, how many will be a given isotope. Ex: Ne-20 90.48% Ne-21 0.27% Ne-22 9.25% Each isotope has its own mass: 19.992440, 20.993847, 21.991386 http://www.chem.ualberta.ca/~massspec/atomic_mass_abund.pdf

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)

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.

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 p84 - 88