Atomic Structure and Electron Configuration

This video tutorial explains how to determine the number of protons, neutrons, and electrons in an atom using the periodic table and nuclear symbols. It covers the concepts of atomic and mass numbers and provides example problems with elements like argon, silver, lithium, and oxygen. The video also demonstrates how to draw Bohr models of atoms, considering electron configurations and charges.

What is the primary source of information for determining the number of protons in an atom?

• The electron configuration

• The atomic mass

• The atomic number

• The chemical symbol

Which number on the periodic table indicates the total number of protons and neutrons in an atom?

• Average atomic mass

• Atomic number

• Electron number

• Mass number

In the example of argon, how many neutrons are present if the mass number is 40 and the atomic number is 18?

• 40

• 58

• 22

• 18

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

• The number of electrons is double the number of protons

• The number of electrons equals the number of protons

• There are fewer electrons than protons

• There are more electrons than protons

In the Bohr model, how many electrons can the first energy level hold?

• 1

• 2

• 8

• 4

How many electrons can the second energy level hold in the Bohr model?

• 2

• 8

• 4

• 6

What is the maximum number of electrons that the fourth energy level can hold in the Bohr model?

• 8

• 18

• 64

• 32

If an atom has a -2 charge, what does this indicate about its electrons?

• It has lost two protons

• It has gained two electrons

• It has lost two electrons

• It has gained two protons

For an oxygen ion with a -2 charge, how many electrons does it have if the atomic number is 8?

• 12

• 10

• 8

• 6

How do you calculate the number of neutrons in an atom?

• Multiply the atomic number by the mass number

• Add the atomic number to the mass number

• Divide the mass number by the atomic number

• Subtract the atomic number from the mass number