Brief introduction on the states of matter. How to recognize and utilize atomic number and mass to determine amount of protons, electrons, and neutrons in an element. How to calculate for isotopes of an element. How to calculate atomic mass of elements and percent abundance of isotopes.
19 19 20
is stopes = same element that weigh
1 16 12
17 1s 18 diff cents creat changes
eg : 3C1 has "Cl and "Cl ,
but more o (1
calculating mass
20 . 7577)(34 97 g/m x)) .
+ (0 2423)
.
(36 .
47 g/m)) = 35 .
4Sy/m>
at Mic Mass = 2 (fraction isotope) (Mass isotope) Memorize
Br atomic mass = 79 904 g/m)
.
79 .
904 = (8 . 42g(me))x + (8) .
92g/ms)) y
* we know x+y = 1 So y = 1 -X
7 n 434 .
= 78 . 92x + 80 . 92 - 83 92x .
1 016 = 2x + X = 0 58 0 492
. .
y= .
# sig figs r wrong , re-learn sig figs
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