Quiz on Atomic Structure and Elements

Which scientist discovered that atoms are mostly empty space?

• Bohr

• Dalton

• Rutherford

• Democritus

Who discovered the electron and described the atom as a positive sphere with embedded electrons?

• Thomson

• Rutherford

• Schrödinger

• Dalton

How did Schrödinger’s model improve upon Bohr’s model?

• Excluded nucleus

• Electrons fixed in shells

• Solid sphere

• Electrons exist in probability regions

What did Dalton propose in 1803 about atoms?

• Atoms are indivisible and form compounds

• Electrons exist in orbitals

• Atoms have a dense nucleus

• Electrons embedded in a positive sphere

Arrange the atomic models from earliest to latest:

• Plum Pudding → Nuclear → Quantum

• Nuclear → Plum Pudding → Quantum

• Quantum → Plum Pudding → Nuclear

• Nuclear → Quantum → Plum Pudding

Which model introduced the concept of a dense nucleus?

• Dalton’s model

• Bohr’s model

• Rutherford’s model

• Thomson’s model

How many protons does a carbon atom have?

• 5

• 6

• 10

• 16

What charge do electrons carry?

• Positive

• Negative

• Neutral

• Double positive

Which particles are in the nucleus?

• Protons and neutrons

• Electrons

• Neutrons only

• Electrons and protons

Why are electrons arranged in shells?

• Different energy levels

• To separate charges

• For proton arrangement

• Random