Exploring the Bohr Model and Electrons

What is the maximum number of electrons in the first shell?

• 8

• 1

• 10

• 2

How many energy levels can an atom have according to the Bohr model?

• An atom can have an infinite number of energy levels according to the Bohr model.

• An atom can have only two energy levels according to the Bohr model.

• An atom can have a fixed number of energy levels, typically five, according to the Bohr model.

• An atom can have a maximum of seven energy levels according to the Bohr model.

What are valence electrons and why are they important?

• Valence electrons are the outermost electrons of an atom that determine its chemical properties and bonding behavior.

• Valence electrons are the inner electrons that do not participate in bonding.

• Valence electrons are the protons in an atom that determine its mass.

• Valence electrons are the electrons that are lost during radioactive decay.

Which shell is closest to the nucleus in an atom?

• M shell

• N shell

• K shell

• L shell

How do energy levels affect the stability of an atom?

• Higher energy levels always lead to instability.

• Energy levels affect stability by determining electron arrangement; full outer levels lead to stability.

• Atoms are stable regardless of electron arrangement.

• Energy levels have no impact on atomic stability.

What is the electron configuration for carbon?

• 1s² 2s² 2p¹

• 1s² 2s² 2p⁴

• 1s² 2s² 2p²

• 1s² 2s¹ 2p²

How many valence electrons does oxygen have?

• 4

• 8

• 6

• 2

What happens to an atom when it gains or loses valence electrons?

• The atom becomes a gas and loses its mass.

• An atom becomes charged (anion if gaining, cation if losing) and alters its reactivity.

• The atom splits into smaller particles and forms a new element.

• The atom remains neutral and unchanged in structure.

What is the significance of the outermost electron shell?

• The outermost electron shell is significant because it determines an atom's chemical properties and reactivity.

• It indicates the mass of the atom.

• It determines the color of the element.

• It affects the size of the nucleus.

How does the Bohr model explain the emission spectrum of hydrogen?

• The emission spectrum of hydrogen is explained by electron transitions between quantized energy levels, emitting photons of specific wavelengths.

• Hydrogen emits light due to collisions with other atoms in space.

• The spectrum is a result of the nucleus emitting energy directly.

• The emission spectrum is caused by random electron movements in the atom.