Osmium appears in the periodic table. rounded to the nearest whole number, how many neutrons, on average, are in an atom of osmium? 76 114 190 266

The number of neutrons in osmium metal are 114

Explanation:

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

Atomic number = number of protons = number of electrons

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

We are given:

Osmium is 76th element of the periodic table.

We know that:

Atomic number = 76 = Number of protons

Mass number = 190

Number of neutrons = Mass number - Atomic number = 190 - 76 = 114

Hence, the number of neutrons in osmium metal are 114

The correct answer is 114.

Explanation:

Atomic number is defined as the number of protons or number of electrons present in an element.

Atomic number = Number of protons = Number of electrons      ......(1)

Atomic mass is defined as the sum of number of protons and neutrons that are present in an element.

Atomic mass = Number of protons + Number of neutrons     .....(2)

For Osmium element:

Atomic number = 76

Atomic mass =

To calculate the number of neutrons, we use equation 2, we get:

Number of neutrons = 190 - 76 = 114

Hence, the correct answer is 114.

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