Atomic Structure and Isotopes

The video tutorial covers the basics of isotopes, atomic numbers, and mass numbers. It explains how to identify isotopes using the periodic table and how to calculate the number of neutrons in an atom. The tutorial includes examples and practice problems to reinforce understanding of these concepts.

What is the atomic number of carbon?

• 6

• 8

• 14

• 12

Which of the following is true about isotopes?

• They have different atomic numbers

• They have different numbers of protons and neutrons

• They have the same mass number

• They have the same number of protons but different numbers of neutrons

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

• Multiply the atomic number by the mass number

• Add the atomic number to the mass number

• Subtract the atomic number from the mass number

• Divide the mass number by the atomic number

What is the mass number of an isotope with 6 protons and 8 neutrons?

• 14

• 12

• 6

• 8

What is the atomic number of boron?

• 5

• 10

• 15

• 20

Which element has an atomic number of 5?

• Nitrogen

• Oxygen

• Carbon

• Boron

Does the atomic number of an element change?

• Yes, it changes frequently

• It changes with temperature

• No, it remains constant for each element

• It changes only under certain conditions

What does the atomic mass of an element represent?

• The number of neutrons only

• The number of protons only

• The sum of protons and neutrons

• The number of electrons

What happens if the atomic number of an element changes?

• The element remains the same

• The element becomes a different element

• The element becomes unstable

• The element becomes an isotope

If an atom has an atomic number of 7, which element is it?

• Nitrogen

• Oxygen

• Carbon

• Hydrogen