Download ISOTOPIC NOTATION isotopes are atoms with the same number of

ISOTOPIC NOTATION
isotopes are atoms with the same number of
protons but different number of neutrons
A
Z
X
A = mass number
_______________________________________
Z = atomic number
________________________________________
X = element symbol
READING ISOTOPIC NOTATION
46
Sc
21
46 = ________________________
(the total
number of protons (21) + neutrons (25)
21 = ________________________
(the total number of protons (21))
Sc = ________________________
In a __________________ atom, the number of
electrons (21) is equal to the number of
protons.
PRACTICE PROBLEMS
15
N # protons = __
7
# neutrons= __
# electrons = __
31
P
15
# p = ____
# n= ____
# e- = ____
PRACTICE PROBLEMS
62
Cu
29
# p = ____
# n= ____
#e- = ___
79
Se
34
# p = ____
# n= ____
#e- = ____
Writing ISOTOPIC NOTATION
1. Write the symbol for the atom with an
atomic number of 21 and a mass number
of 48.
2. Give the complete chemical notation for
the nuclide with 23 protons, 26 neutrons
and 23 electrons.
3. Write the isotopic notation for
a. Z = 46
A = 110
b. An atom containing 24 protons, 28
neutrons, and 24 electrons
c. Titanium-50
PRACTICE PROBLEMS
196 Pt
78
1. # p = _____
# n = _____
#e- = _____
mass number = ________
atomic number = _______
atomic mass = ________
name of element = _______
2. Indicate the appropriate atomic mass of an element with
30 protons, 30 neutrons, and 30 electrons.