Manganese Isotopes and Atomic Mass

This video tutorial explains how to determine the number of protons, neutrons, and electrons in manganese isotopes using the periodic table. It covers the atomic number, which equals the number of protons, and explains that in a neutral element, the number of electrons equals the number of protons. The video also demonstrates how to calculate the number of neutrons using the mass number and discusses the concept of average atomic mass, which considers the abundance of isotopes.

What is the atomic number of manganese, and what does it represent?

• 25, representing the number of protons

• 25, representing the number of neutrons

• 55, representing the mass number

• 54, representing the number of electrons

In a neutral manganese atom, how does the number of electrons compare to the number of protons?

• There are more electrons than protons

• The number of electrons is double the number of protons

• There are fewer electrons than protons

• The number of electrons equals the number of protons

What is the main difference between the isotopes of manganese?

• The number of electrons

• The number of protons

• The number of neutrons

• The atomic number

How do you calculate the number of neutrons in an isotope of manganese?

• Add the atomic number to the mass number

• Divide the mass number by the atomic number

• Subtract the atomic number from the mass number

• Multiply the atomic number by the mass number

What is the mass number of manganese-54?

• 55

• 54

• 29

• 25

What is the mass number of manganese-55?

• 54

• 55

• 30

• 25

If the mass number of an isotope is 55 and it has 25 protons, how many neutrons does it have?

• 25

• 30

• 54

• 55

How is the average atomic mass of an element determined?

• By averaging the atomic numbers of its isotopes

• By averaging the mass numbers of its isotopes based on abundance

• By adding the number of protons and electrons

• By subtracting the number of neutrons from the mass number

What is the average atomic mass of manganese rounded to the nearest whole number?

• 54

• 55

• 25

• 30

Which isotope of manganese is more abundant based on the average atomic mass?

• Manganese-54

• Manganese-55

• Neither is abundant

• Both are equally abundant