the table below gives the numbers of protons, electrons, and neutrons in four atoms.\n|atom|number of…

the table below gives the numbers of protons, electrons, and neutrons in four atoms.\n|atom|number of protons|number of electrons|number of neutrons|\n|----|----|----|----|\n|1|39|39|52|\n|2|40|40|50|\n|3|39|39|54|\n|4|40|40|51|\nbased on the information that is given, which atom in the table has the highest mass?\no 1\no 2\no 3\no 4

Answer

Explanation:

Step1: Recall mass - number formula

The mass number (A) of an atom is given by the sum of the number of protons (p) and neutrons (n), i.e., $A=p + n$. Electrons have negligible mass compared to protons and neutrons, so they are not considered in calculating the mass number.

Step2: Calculate mass number for atom 1

For atom 1, $p = 39$ and $n=52$. Then $A_1=39 + 52=91$.

Step3: Calculate mass number for atom 2

For atom 2, $p = 40$ and $n = 50$. Then $A_2=40+50 = 90$.

Step4: Calculate mass number for atom 3

For atom 3, $p = 39$ and $n=54$. Then $A_3=39 + 54=93$.

Step5: Calculate mass number for atom 4

For atom 4, $p = 40$ and $n=51$. Then $A_4=40 + 51=91$.

Step6: Compare mass numbers

Comparing $A_1 = 91$, $A_2=90$, $A_3 = 93$, and $A_4=91$, we can see that atom 3 has the highest mass number.