use the information in the square to answer the questions about tin. how many protons are in an atom of tin…

Explanation:

Step1: Recall atomic number property

The atomic number is equal to the number of protons. The atomic number of tin (Sn) is 50, so the number of protons is 50.

Step2: Recall electron - proton relationship

In a neutral atom, the number of electrons is equal to the number of protons. Since the number of protons in tin is 50, the number of electrons is 50.

Step3: Calculate number of neutrons

The atomic mass (118.71) is approximately the sum of protons and neutrons. Let the number of neutrons be $n$. We know that atomic mass $\approx$ number of protons+number of neutrons. So $n\approx118.71 - 50=68.71$. Rounding to the nearest whole number, the number of neutrons is 69.

Answer:

How many protons are in an atom of tin? 50 How many electrons are in an atom of tin? 50 How many neutrons are in an atom of tin? Round your answer to the nearest whole number. 69