Atoms Review

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons

• The total number of electrons

How can you use the periodic table to find the atomic mass of an element?

• By locating the element and reading the number below the chemical symbol

• By counting the number of protons

• By adding the number of protons and electrons

• By finding the number of neutrons only

Where are protons located in an atom?

• In the nucleus

• In the electron cloud

• Outside the atom

• Along the electron shells

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable

How can you determine the number of neutrons in an atom?

• Atomic number minus atomic mass

• Atomic mass minus atomic number

• Sum of protons and electrons

• Number of protons only

What principle did Werner Heisenberg introduce in 1927 that states it is impossible to know both an electron's position and path precisely at the same time?

• Quantum Theory

• Relativity Theory

• Uncertainty Principle

• Electron Cloud Model

Which theory was influenced by Heisenberg's Uncertainty Principle?

• Bohr Model

• Electron Cloud Theory

• Quantum Mechanics

• Classical Physics

According to Dalton's Atomic Theory, what are atoms made of?

• Small, indivisible particles

• Divisible particles

• Large, complex structures

• Continuous matter

What does Dalton's Atomic Theory suggest about atoms of the same element?

• They are exactly alike

• They are different in size

• They have different properties

• They can be subdivided

According to Dalton's Atomic Theory, what can atoms of different elements do?

• They can join to form molecules or compounds

• They cannot interact with each other

• They repel each other

• They remain isolated