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Atomic Models and Structures Quiz

#1

Who proposed the plum pudding model of the atom?

J.J. Thomson
Explanation

Thomson suggested electrons embedded in a positively charged sphere.

#2

What is the name of the model that suggests electrons move in fixed orbits around the nucleus?

Bohr Model
Explanation

Bohr's model postulated discrete electron orbits, akin to planets orbiting the sun.

#3

What is the charge of an electron?

Negative
Explanation

Electrons possess a negative electrical charge.

#4

Who discovered the nucleus of an atom?

Ernest Rutherford
Explanation

Rutherford's gold foil experiment led to the discovery of the atomic nucleus.

#5

What is the maximum number of electrons that can occupy the first shell of an atom?

2
Explanation

The first shell can hold a maximum of two electrons.

#6

Who proposed the planetary model of the atom?

Niels Bohr
Explanation

Bohr's model conceptualized electrons orbiting the nucleus in fixed paths.

#7

What is the charge of a proton?

Positive
Explanation

Protons carry a positive electrical charge.

#8

What is the charge of a neutron?

Neutral
Explanation

Neutrons have no net electrical charge.

#9

What does the atomic number of an element represent?

Number of protons
Explanation

Atomic number indicates the quantity of protons in an atom's nucleus.

#10

Who proposed the concept of electron shells or energy levels?

Niels Bohr
Explanation

Bohr introduced the idea of electrons occupying specific energy levels.

#11

Who proposed the quantum mechanical model of the atom?

Erwin Schrödinger
Explanation

Schrödinger formulated a model describing electron probability distributions.

#12

What is the name of the model that describes the atom as mostly empty space with a dense nucleus at its center?

Rutherford Model
Explanation

Rutherford's model depicted atoms as having a dense central nucleus.

#13

Who proposed the concept of the wave-particle duality of matter?

Louis de Broglie
Explanation

De Broglie suggested matter can exhibit both wave and particle properties.

#14

What is the modern description of the arrangement of electrons in an atom?

Quantum Mechanical Model
Explanation

This model describes electrons' probable locations around the nucleus.

#15

Which scientist introduced the concept of the uncertainty principle?

Werner Heisenberg
Explanation

Heisenberg's principle states inherent limits in measuring certain pairs of properties.

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