How many neutrons are in the nucleus of an atom of 118 50 Sn?

Answer 1

Sn (tin) has an atomic number of 50, which indicates there are 50 protons in its nucleus. If the Atomic Mass is 118, then the number of neutrons is the difference between the two numbers, or 68 neutrons.

Answer 2

Short: 118-50 = 68 neutrons

Added:

This is an isotope of Sn atom number 50 with mass number 118.

If you only learn the following two things:

• mass number is total of number of protons AND neutrons (= 118)
• atom number is total of number of protons (= 50)

then you're able to calculate the number of (only the) neutrons by substracting these two: 118 - 50 = 68 neutrons

[from Wikipedia]

• Tin is the element with the greatest number ofstable isotopes ( ten );

  these include all those with atomic masses between 112 and 124, with the exception of 113, 121 and 123.

  Of these, the most abundant ones are 120Sn (32%), 118Sn (24%), and116Sn (14.5%).

  The average atomic mass is 118.7 a.m.u.

There are 28 additional unstable isotopes that are known, encompassing all the remaining ones with atomic masses between 99 and 137

Answer 3

Tin has atomic number 50, implying that there are 50 protons in its nuclei, and further implying that there must be 72 neutrons in the nuclei of 112Sn.

Answer 4

Tin is a metal element. There are 50 electrons in a single atom.

Answer 5

Protons: 50

Neutrons:69

Electrons:50

Answer 6

68 Neurons