3.1-3.10 Mod 3

What determines the chemical properties of different elements?

• The number of electrons only
• The number of protons, neutrons, and electrons
• The weight of neutrons only

In Bohr’s atomic model, what defines the maximum number of electrons in a shell?

• 2n²
• n²
• 2n

What happens to an atom when it loses an electron?

• It becomes a neutral ion
• It becomes a positive ion (cation)
• It becomes a negative ion (anion)

Valence electrons are crucial for which property of an atom?

• Atomic weight
• Thermal expansion
• Chemical bonding

What is the SI unit of electrical charge?

• Coulomb (C)
• Ampere (A)
• Volt (V)

How does a positively charged rod affect an uncharged metal bar by contact?

• It adds protons to the metal bar
• It draws electrons from the metal bar
• It neutralizes the metal bar completely

In an electrostatic field, the direction of the field lines around a positive charge is:

• Towards the charge
• Away from the charge
• Random direction

What happens to the charge on a hollow conducting sphere?

• It distributes evenly on the inner surface
• It remains concentrated at the center
• It distributes evenly on the outer surface

What is the SI unit of potential difference?

• Joule (J)
• Coulomb (C)
• Volt (V)

According to Coulomb's Law, the electrostatic force between two charges is:

• Directly proportional to the distance squared
• Directly proportional to the product of their charges
• Inversely proportional to the product of their charges