Exploring Atomic Structure and Isotopes

Who is known as the father of modern atomic theory?

• Albert Einstein

• John Dalton

• Niels Bohr

• Dmitri Mendeleev

What is the atomic number of an element?

• The number of protons in an atom

• The number of neutrons in an atom

• The number of electrons in an atom

• The sum of protons and neutrons in an atom

Which of the following statements best describes isotopes?

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same number of electrons but different numbers of protons

• Atoms with different numbers of protons and neutrons

What is the significance of the atomic mass listed on the periodic table?

• It represents the number of protons in an atom

• It represents the average mass of all isotopes of an element

• It represents the number of electrons in an atom

• It represents the mass of the most common isotope

Which scientist proposed the planetary model of the atom?

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

• James Chadwick

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

• Subtract the atomic number from the atomic mass

• Add the atomic number to the atomic mass

• Subtract the atomic mass from the atomic number

• Add the number of protons and electrons

What does the periodic table primarily organize elements by?

• Atomic mass

• Atomic number

• Number of isotopes

• Chemical reactivity

Which of the following elements has isotopes with different atomic masses?

• Helium

• Carbon

• Neon

• Argon

What is the main difference between isotopes of the same element?

• Number of protons

• Number of neutrons

• Number of electrons

• Chemical properties

Which of the following is a correct representation of an isotope of Carbon with 6 protons and 8 neutrons?

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