Question

Half life of isotope of sodium 24 is 15 hrs a sample of this has mass 2 gm. Find the amount remaining after 60 hrs.

Answer 1

Answer:

What is an isotope?

An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties.

Explanation:

HERE IS THE SOLUTION OF THE QUESTION YOU ASKED!

0.1g

Explanation:

As we start with 1.6 grams and we know that 60 hours have passed, this equals 4 half-lives. This means that the weight of the sample has effectively been halved 4 times:

(0.5)4

So simply multiply this with the mass:

(0.5)4×1.6=0.1g

Generally:

Remaining mass=(0.5)n×m

Where n is the number of half-lives passed and m is the original mass of the sample.

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