chem1

chem1

University

15 Qs

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chem1

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Assessment

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Practice Problem

Hard

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Ahmed Kibret

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is radioactivity?

The absorption of radiation by the nucleus of an atom

The stability of the nucleus in an atom

The emission of radiation from the nucleus of an unstable atom

The process of converting energy into radiation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who conducted the gold foil experiment that led to the discovery of the nucleus?

Albert Einstein

Niels Bohr

Marie Curie

Ernest Rutherford

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main type of radiation emitted during radioactive decay that consists of high-energy electromagnetic radiation?

Delta (δ) radiation/particles

Beta (β) radiation/particles

Alpha (α) radiation/particles

Gamma (γ) radiation/rays

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What did Ernest Rutherford propose based on the results of the gold foil experiment?

Wave Model of the Atom

Nuclear Model of the Atom

Quantum Model of the Atom

Bohr's Model of the Atom

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary composition of the nucleus in an atom?

Protons, neutrons, and electrons

Protons and electrons

Neutrons and electrons

Protons and neutrons

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the spin quantum number (m_s) in describing electron spin orientations within orbitals?

It determines the direction of electron spin

It determines the number of electrons in an orbital

It determines the shape of orbitals

It determines the energy levels of electrons

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which principle explains the order in which electrons fill orbitals based on increasing energy levels?

Hund's Rule

Pauli Exclusion Principle

Heisenberg Uncertainty Principle

Aufbau Principle

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