Atomic Theory Intro to DC

What is the charge of the nucleus in the Bohr model of the atom?

• Negatively charged

• Positively charged

• Neutral

• No charge

According to the Bohr model, where are the electrons located?

• Inside the nucleus

• In discrete shells around the nucleus

• Uniformly distributed throughout the atom

• Outside the atom

What does the atomic number of an element represent?

• The number of neutrons in the nucleus

• The number of electrons in discrete shells

• The number of protons in the nucleus

• The total number of nucleons in the nucleus

In a neutral atom, how does the number of electrons compare to the number of protons?

• There are more electrons than protons

• There are fewer electrons than protons

• The number of electrons is equal to the number of protons

• The number of electrons is unrelated to the number of protons

What is the outer shell of an atom called, where electrons are involved in chemical reactions and account for electrical and thermal conductivity?

• Core shell

• Valence shell

• Electron cloud

• Nucleus

How many electrons are there in the valence shell of a neutral silicon (Si) atom?

• 2

• 4

• 6

• 8

Is silicon (Si) a conductor, insulator, or semiconductor?

• Conductor

• Insulator

• Semiconductor

• Superconductor

What is the nature of the force between like charges?

• They attract each other

• They repel each other

• They do not interact

• They cancel each other out

How do unlike charges interact?

• They repel each other

• They attract each other

• They do not interact

• They cancel each other out

The force between charges is directly proportional to which of the following?

• The square of the distance between the charges

• The cube of the distance between the charges

• The charge of the objects

• The mass of the objects