Quatum Numbers

Question 1

In 1926, ________, gave the idea of wave motion of electrons

Answer 1

Erwin Schrödinger

Question 2

In 1926, Erwin Schrödinger, gave the idea of _____ of electrons

Answer 2

wave motion

Question 3

He formulated an equation called the “______”, in which electrons are treated as moving wave-like motion in 3D space around the nucleus

Answer 3

Schrödinger equation

Question 4

Are set of numbers used to describe the position and energy of the electron in an atom

Answer 4

quantum numbers

Question 5

The four quantum numbers are:

Answer 5

Principal Quantum Number (n)

Orbital Angular Momentum Quantum Number (l) or Azimuthal Quantum Number

Magnetic Quantum Number (ml)

Electron Spin Quantum Number (ms)

Question 6

Represents the energy level of the electron.

Answer 6

the principal Quantum Number (n)

Question 7

Designates the principal electron shell (n)

Answer 7

The Principal Quantum Number n

Question 8

The first principal shell is also called the ,_________.

Answer 8

ground state, or lowest energy state

Question 9

When n = 1, the electron is on ___ energy level, and so on

Answer 9

1st

Question 10

The larger the “n” value, the higher the _____, the farther is the electron from the nucleus and the ____ is the atom.

Answer 10

energy level,

bigger

Question 11

Possible values of n =

Answer 11

1,2,3,4 …

Question 12

Determines the shape of an orbital, and therefore the angular distribution

Answer 12

Orbital Angular Momentum Quantum Number (l) or Azimuthal Quantum Number

Question 13

Each value of __ indicates a specific s, p, d, f subshell (each unique in shape).

Answer 13

ℓ

Question 14

The value of ℓ is dependent on the _______

Answer 14

principal quantum number n.

Question 15

If n=7, what are the possible values of ℓ?
-

Answer 15

Since ℓ can be zero or a positive integer less than ( n−1), it can have a value of 0, 1, 2, 3, 4, 5 or 6.

Question 16

If l=4, how many angular nodes does the atom have?

Answer 16

4 ; l= no. of nodes

Question 17

determines the number of orbitals and their orientation within a subshell

Answer 17

magnetic Quantum Number ml

Question 18

It designates the direction of the electron spin and may have a spin of +1/2, represented by↑, or –1/2, represented by ↓

Answer 18

Electron Spin Quantum Number ms

Question 19

This means that when ms is positive the electron has an upward spin, which can be referred to as "____." When it is negative, the electron has a downward spin, so it is "____."

Answer 19

spin up

spin down

Question 20

ms=

Answer 20

±1/2