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gulaghasi [49]
2 years ago
10

In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly?

Chemistry
1 answer:
sveta [45]2 years ago
7 0

Answer:

A.

Explanation:

The number of the them will result in A.

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2. Calculate the atomic mass of an element that has two isotopes, each with 50.00% abundance. One isotope has a mass of 63.00 am
melamori03 [73]

Answer:

The atomic mass of element is 65.5 amu.

Explanation:

Given data:

Abundance of X-63 = 50.000%

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Solution:

Abundance of X-68 = 100-50 = 50%

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

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The atomic mass of element is 65.5 amu.

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