University:
Thomas Jefferson University
Course:
CHEM 103 | Chemistry I
Academic year:

2024
Views:

15

Pages:

1
Author:

Imani H.

Ex : Examples 1/18/24 Isotopes "Silver-Ag 2) Sn-fin 3) 21 7 Hydrogen has lead-Pb -M M -1 -99 % M/min > - St x - 1 = . 181 . 0 = 0149 . = % Carbon has 3 ~ 0 01498 . , Compounds are o · building > - ball E , long Is blocks called atoms . found when atoms combine to form molecules . oppositive chage BC neutral atom a dating) Radioactive An is formed Ion when atoms gain or loses The charge right 2) most ofMass # of elections empty is concentrated is called the nucleus 2 3 . Atomic Structure Small Volume in a (t) elections) positive (loses negative (gain indicated as of the atomic (# of a electrons ( superscript symbol. Protons) (chargel - Ex . Mass charge. atomic Symbolism = Electron-negative very small - Neutron-neutral Atomic number - the Mass number written Isotopes as - different of Much , , a slightly larger an superscript , Me are F, M = 12 Mg + , protons to element have the . number of Neutrons than in protons plus charge Oxygen has 3 primary 30/8 . 205 %, 17 . . . 995) How to Copper of 10 + protons Ca2 but z has . 757 %, 15 . the am of atoms that . 995amu) average . + , ! "8 (0 , (0 . nections-36 percent Co 4 "Cu . 20 . 999a7 = 15 999 . abundance with , masses abundance percent 62 9296 . for each = . . = x(62 9296) + . = 62 9296x + . 63 55 - (1 - . ! 64 9278 . neutrons-18 - .. 64 9278 . 64 9278 . . 63 C of x)(64 9278) - 1 . 38 / 1 . 9352 0 - 038 %, 16 00206)(k7 999) aug Mass 63 55 (frompenodic table let x fraction of 63 I-x-fraction + protons . . mass " What is the . . 00038)/16 999) isotopes 2 fraction .. calculate X= symbol . Isotopes"0(99 . - the left of the element same number isotopes 1 9999mu). Calculate 10 99757)(15 the BKNOW , fractional abundances are 63 55 protons 35 Neutrons all Isotopes = the atom . weighted a Isotope? ↑ Bri proton is specific isotope a FzM masses of 63 55 than electron the total number of - mi Mass . larger number of as & 64 9278 2+ , Proton-positive abundance . - 2 the relative abundance of on naturally , is is . The fractional Fi f2 electrons . are periodic table the isotopes of that element over depends Average Conclusions atom all Isotope" . C the pure on exactly amo the number of elections the number of protons . anions are Negative electrons , a mass based is 14C equal to to the 1) most of the on > - (carbon 99 %- / Cations Q o Q> The atomic mass listed occur 2- Atoms Molecules composed of 12 isotopes . Chapter of average in For · Radioactive 0 0149 2 Elements C has 30 12C 4 -8 The atomic Mass unit (amul 3 isotopes 3H

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