Atomic Structure Multiple Choice Questions

During a science class, Avery, Rohan, and Mason are discussing what determines the chemical identity of an atom. Which of the following is the correct answer?

• Neutrons

• Protons

• Electrons

• Shells

Elijah is studying atoms in his science class. He learns that a neutral atom has the same number of electrons as:

• Shells

• Neutrons

• Protons

• Valence electrons

Emma and Michael are discussing the atoms of the same element, but with different mass numbers. What do these isotopes have?

• Different protons, same neutrons

• Same protons, different neutrons

• Same neutrons, different electrons

• Same electrons, different protons

When Sophia observes a neutral atom losing an electron in her science experiment, what does the atom become?

• A. A cation (positive ion)

• B. An anion (negative ion)

• C. A neutron

• D. A proton

When Henry, a neutral atom, gains an electron, what does he become?

• A. A proton

• B. An isotope

• C. A cation

• D. An anion

Liam, Aria, and Grace are discussing which three of the first 20 elements have full outer shells. Which elements are they talking about?

• A. Helium, Neon, Argon

• B. Oxygen, Nitrogen, Fluorine

Avery and Mason are learning about elements in science class. Their teacher explains that some elements have full outer shells, making them very stable. These elements are called:

• Halogens

• Noble gases

• Alkali metals

• Transition metals

Charlotte, Ethan, and William each have a collection of gold atoms. What do all the gold atoms in their collections have in common?

• Same number of electrons

• Same number of protons

• Same mass number

• Same neutron number

Nora, Grace, and Evelyn are discussing atoms in their science class. Which of the following statements made by them is FALSE?

• A. All atoms of the same element have the same number of protons

• B. All atoms of the same element have the same mass number

• C. Atoms of different elements differ in proton number

• D. Isotopes have different neutron numbers

Grace is learning about elements in her science class. She wants to know what the atomic number of an element represents. What should she find out?

• Total number of particles in the nucleus

• Number of neutrons

• Number of protons

• Number of electrons in an ion