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3 years ago

The atomic number of krypton (Kr) is 36, and its mass number is 84. How many neutrons does it have?

Chemistry

2 answers:

lord [1]3 years ago

8 0

Answer: 48 neutrons

Explanation:

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons

Given: Atomic number of Krypton = Number of electrons = Number of protons = 36

Mass number of krypton = Number of protons + Number of neutrons = 84

Thus, 84= 36 + Number of neutrons

Number of neutrons = 48

Thus krypton has 48 neutrons.

AleksAgata [21]3 years ago

3 0

i believe the answer is 48 neutrons

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The mass of caffeine extracted is $P = 39.8 \ mg$

Explanation:

From the question above we are told that

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$P = 40 * [\frac{2}{4.6 * 2 + 2} ]^3$

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Hi there!!

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