Atomic timeline questions Clue

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Atomic Timeline Clue

What was Democritus’ main contribution to atomic theory?

Atoms are mostly empty space.

Atoms can combine in chemical reactions.

Atoms are indivisible particles.

Atoms are made of smaller particles.

Which term did Democritus use to describe the smallest particle of matter?

Electron

Atom

Neutron

Molecule

Which of the following is a part of Dalton’s atomic theory?

Compounds are combinations of atoms.

Atoms contain protons and neutrons.

Atoms cannot be created in nuclear reactions.

Atoms are mostly empty space.

Which of the following is a fundamental idea from Dalton's atomic theory?

Atoms are mostly empty space.

Atoms are indivisible and indestructible.

All matter is made of atoms.

Atoms contain a nucleus with protons and neutrons.

What model of the atom did J.J. Thomson propose?

Planetary model

Quantum mechanical model

Nuclear model

Plum pudding model

What discovery is J.J. Thomson most famous for?

The nucleus

Protons

Neutrons

Electrons

J.J. Thomson’s experiments with cathode rays led to the discovery of which property of electrons?

Electrons are neutral.

Electrons have a negative charge.

Electrons are located in the nucleus.

Electrons have a positive charge.

What experiment did Ernest Rutherford conduct that led to the discovery of the nucleus?

Cathode ray tube experiment

Oil drop experiment

Gold foil experiment

X-ray diffraction

Rutherford’s model of the atom proposed that:

Electrons orbit the nucleus in specific energy levels.

The atom is mostly empty space with a positive nucleus.

Electrons are scattered throughout a positive sphere.

Atoms are indivisible and solid.

What is the main feature of Niels Bohr’s atomic model?

Electrons move in fixed orbits around the nucleus.

Atoms are made of indivisible particles.

The nucleus contains both protons and neutrons.

The nature of radioactive decay.

According to Niels Bohr's atomic model, how do electrons move around the nucleus?

In random patterns with varying energy levels.

In a cloud-like formation.

In paths determined by their charge.

In fixed energy levels or orbits.

What concept did Erwin Schrödinger introduce in his atomic model?

Electrons orbit the nucleus in fixed paths.

Electrons are embedded in a positive sphere.

Electrons exist in a probability-based electron cloud.

Electrons move like planets orbiting the sun.

Which subatomic particle was discovered last?

Nucleus

Neutron

Proton

Electron

Which of the following scientists developed the quantum mechanical model of the atom?

Niels Bohr

J.J. Thomson

Ernest Rutherford

Erwin Schrödinger

Which of the following particles are found in the nucleus of an atom?

Electrons only

Protons and neutrons

Neutrons and electrons

Protons and electrons

What charge does a proton carry?

Positive

Negative

Neutral

None of the above

What charge does an electron carry in an atom?

Negative

Positive

Neutral

None of these

Experiment Hall Atomic Fusion History