2.6-2.9

Question 1

principle quantum number(n)

Answer 1

the quantum number relating to the size and energy of an orbital; it can have any positive integer value.

Question 2

angular quantum momentum number (l)

Answer 2

the quantum number relating to the shape of an orbital, which can assume any integral value from 0 to n-1 for each value of n.

Question 3

what is a sub shell?

Answer 3

a set of orbitals with a given azimuthal quantum number

Question 4

what are nodes?

Answer 4

an area of an orbital having zero electron probability. (the number of nodes increases as “n”)

Question 5

degenerate

Answer 5

a group of orbitals with the same energy.

Question 6

what did austrian physicist, wolfgang pauli, discover?

Answer 6

in a given atom, no two electrons can have the same set of four quantum numbers. (pauli exclusion principle)

Question 7

what are polyelectronic atoms?

Answer 7

an atom with more than one electron.