Each of the following values was read on an instrument of measuring device. In each case the last digit was estimated. Tell what
1 answer:
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<u>Answer:</u>
<u>For a:</u> The isotopic representation of iodine is
<u>For b:</u> The isotopic representation of cesium is
<u>For c:</u> The isotopic representation of strontium is
<u>Explanation:</u>
The isotopic representation of an atom is:
where,
Z = Atomic number of the atom
A = Mass number of the atom
X = Symbol of the atom
- <u>For a:</u>
We are given:
Number of neutrons = 78
Atomic number of iodine = 53 = Number of protons
Mass number = 53 + 78 = 131
Thus, the isotopic representation of iodine is
- <u>For b:</u>
We are given:
Number of neutrons = 82
Atomic number of cesium = 55 = Number of protons
Mass number = 55 + 82 = 137
Thus, the isotopic representation of cesium is
- <u>For c:</u>
We are given:
Number of neutrons = 52
Atomic number of strontium = 38 = Number of protons
Mass number = 38 + 52 = 90
Thus, the isotopic representation of strontium is