a Strontium has four isotopes. Strontium-84 has a very low natural abundance, bu

Question

a Strontium has four isotopes. Strontium-84 has a very low natural abundance, but^86Sr, ^87Sr, and 88Sr are all reasonably abundant. Knowing the atomic weight of strontium is 87.62, which of the more abundant isotopes predominates? Strontium-87 Strontium-88 Strontium-86 b Chlorine has two isotopes. Both^35Cl and^37Cl are reasonably abundant Knowing the atomic weight of chlorine is 35.45 which of the isotopes predominates? Chlorine-37 Chlorine-35 c Boron has two isotopes Both^10B and^11B are reasonably abundant. Knowing the atomic weight of boron is10.81 which of the isotopes predominates? Boron-11 Boron-10

Explanation / Answer

a)

atomic weight of Strontium is 87.62

It is closest to Strontium-87

So, the most abundant isotope is Strontium-87

b)

atomic weight of chlorine is 35.45

It is closest to chlorine-35

So, the most abundant isotope is chlorine-35

c)

atomic weight of Boron is 10.81

It is closest to Boron-11

So, the most abundant isotope is Boron-11

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