Bohr, Rutherford, Quantum Mechanics

Which scientist's atomic model shows that electrons travel in fixed paths of energy around the nucleus of the atom?

• John Dalton

• Ernest Rutherford

• Werner Heisenberg

• Niels Bohr

Heisenberg's Uncertainty Principle states that it is impossible to know both the __________ and the __________ of an electron at any given point in time.

• velocity;charge

• charge;size

• size;location

• velocity;location

An atom of which element is represented in the following Bohr model?

• K

• Na

• Li

• Cl

Tags

NGSS.HS-PS1-1

In the quantum mechanical model, the principal quantum number (n) represents what?

• the main energy level

• the shape of the orbital

• the spin direction of the electron

• the orientation of the orbital

What is the equation for determining how many electrons each principal energy level can hold?

• 2n²

• n²/2

• n²

• 2n

Which of the following is NOT a valid set of four quantum numbers?

• n = 3; l = 1; ml = -1; ms = -1/2

• n = 4; l = 3; ml = -3; ms = +1/2

• n = 1; l = 0; ml = 0; ms = -1/2

• n = 2; l = 1; ml = -2; ms = +1/2

Which orbital shape is the following:

• p-orbital

• s-orbital

• d-orbital

• f-orbital

What is the difference in a 1s orbital and a 2s orbital?

• The size

• The shape

• The number of electrons

• None of the above

How many valence electrons does a neutral atom of sulfur contain?

• 1

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following would accurately represent a neutral atom of phosphorus?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1