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?\n1\n2\n3\n4

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?\n1\n2\n3\n4

Answer

Answer:

C. 3

Explanation:

Step1: Recall mass - number formula

Mass number = Protons + Neutrons. Electrons have negligible mass and are not considered in mass - number calculation.

Step2: Calculate mass number of Atom 1

Mass number of Atom 1 = 39+52 = 91

Step3: Calculate mass number of Atom 2

Mass number of Atom 2 = 40 + 50=90

Step4: Calculate mass number of Atom 3

Mass number of Atom 3 = 39+54 = 93

Step5: Calculate mass number of Atom 4

Mass number of Atom 4 = 40+51 = 91

Step6: Compare mass numbers

93>91 = 91>90. Atom 3 has the highest mass number.