Skip to content- How many electrons can the second shell of an atom hold?
- A) 2
- B) 8
- C) 18
- D) 32
- Answer: B) 8
- What is the principle behind the atomic emission spectrum?
- A) Electrons move to higher energy levels when energy is absorbed
- B) Electrons move to lower energy levels when energy is absorbed
- C) Electrons emit specific wavelengths of light when they return to lower energy levels
- D) Electrons emit specific wavelengths of light when they move to higher energy levels
- Answer: C) Electrons emit specific wavelengths of light when they return to lower energy levels
- In the Bohr model of the atom, where are electrons located?
- A) In the nucleus
- B) In fixed orbits around the nucleus
- C) In a cloud around the nucleus
- D) In energy levels that are not fixed
- Answer: B) In fixed orbits around the nucleus
- Which of the following is true about isotopes of an element?
- A) They have different numbers of protons
- B) They have the same number of neutrons
- C) They have the same number of electrons
- D) They have different numbers of neutrons
- Answer: D) They have different numbers of neutrons
- What is the maximum number of electrons in the third shell of an atom?
- A) 8
- B) 18
- C) 32
- D) 50
- Answer: B) 18
- Which of the following is not a part of Dalton’s atomic theory?
- A) All matter is composed of atoms
- B) Atoms are indivisible
- C) All atoms of a given element are identical in mass and properties
- D) Atoms are made up of protons, neutrons, and electrons
- Answer: D) Atoms are made up of protons, neutrons, and electrons
- What is the name of the region where electrons are most likely to be found?
- A) Nucleus
- B) Orbital
- C) Neutron shell
- D) Proton cloud
- Answer: B) Orbital
- Which quantum number describes the shape of an electron’s orbital?
- A) Principal quantum number
- B) Angular momentum quantum number
- C) Magnetic quantum number
- D) Spin quantum number
- Answer: B) Angular momentum quantum number
- Which scientist’s experiment led to the discovery of the nucleus?
- A) J.J. Thomson
- B) Niels Bohr
- C) Ernest Rutherford
- D) James Chadwick
- Answer: C) Ernest Rutherford
- What is the principal quantum number for the outermost electrons in a potassium atom?
- A) 1
- B) 2
- C) 3
- D) 4
- Answer: C) 4
Click here to Join