ch 3 pt 2 quantum numbers

What is the correct electron configuration for Cl-

1s^2 2s^2 2p^6 3s^ 2 3p^6

20. What is the ground state electron configuration of the Zr2+ ion?

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 4d^2

How many sublevels are in the second principal energy level?

2

If n = 2, how many orbitals are possible?

2

Identify the subshell (sublevel) in which electrons with the following quantum numbers are found: n = 2, l = 1

2p

Identify the subshell (sublevel) in which electrons with the following quantum numbers are found: n = 4, l = 2

4d

Identify the subshell (sublevel) in which electrons with the following quantum numbers are found: n=6, l=0

6s

For which of the following elements would you expect to have electrons completely filling the 4d orbitals? A. Y B. Zr C. Mo D. Rh E. Ag

Ag

If a substance has no unpaired electrons in its electron configuration, it is slightly repelled by a magnetic field. It is _____________

Diamagnetic

The first ________________________- energy (IE 1) is the energy required to remove one mole of electrons from one mole of gas-phase atoms

Ionization

arrange argon, magnesium, and phosphorus in order of increasing first ionization energy.

Mg<p< Ar

Which of the following atoms would have the largest first ionization energy? 1) Na 2) K 3) Rb 4) Cs

Na

Which of the following atoms would have the largest first ionization energy 1) Na 2) Mg 3)Al 4) Si

Si

Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. ture or false?

True

What is the correct electron configuration for Fe^3+

[Ar] 3d^5

What is the correct electron configuration for Sn?

[kr] 5s^2 4d^10 5p^2

Which of the following combinations of quantum numbers is not allowed? a) n = 1, l = 1, ml = 0, ms = 1/2 b) n = 3, l = 0, ml = 0, ms = -1/2 c) n = 2, l = 1, ml = -1, ms = 1/2 d) n = 4, l = 3, ml = -2, ms = -1/2 e) n = 4, l = 2, ml = 0, ms = 1/2

a) n = 1, l = 1, ml = 0, ms = 1/2 l must be 0- (n-1)

electron _____________ is the energy change that occurs when one mole of electrons combines with one mole of atoms or ions in the gas

affinity

effective nuclear charge (Zeff)

amount of charge felt by the most recently added electron

___________ are much smaller than parent atoms

cations

Atomic radii of the elements ________________ with increasing atomic number across rows because their valence electrons experience greater Z eff or effective nuclear charge as Z increases

decrease

Electrons in orbitals with higher values of n are _________________ from the nucleus.

further

First ionization energies generally __________ from left to right across a row because the values of Z eff or effective nuclear increase.

increase

As n increases, the distance from the nucleus ____ (increases, decreases, or stays the same)

increases

electron affinity trend

increases to the right and up

Na + and F− are ___________________ since they have the same electron configuration.

isoelectronic

arrange na+ , na and k in order of size by largest to smallest

k> na> na+ *cations are much smaller than parent atoms

the number of orbitals in a shell depends on the number of possible values of __________ which ranges from (-l to l)

m sub l or m l

which quantum numbers describes a 3d orbital (list n, l, m l and m spin )

n=3 l=2 ml=0 m spin= 1/2

What is the correct ordering of atomic radii, from smallest to largest of se, br,o,s

o<s<se<br

Arrange P, S, and O in order of greatest to least atomic radius

p> s> o

If a substance has unpaired electrons in its electron configuration, it is attracted to a magnetic field. it is _____________

paramagnetic

size of atoms is expressed in terms of

radii

all s orbitals are

spherical

3. The _______ values correspond to the subshell designations s,p,d and f

ℓ or l