Chem 151 Final

A one-electron ion shows a green emission line at 516.81 nm, corresponding to a one-electron transition from n = 14 to n = 10. To find the next longest possible wavelength (line) in the emission series for this ion that ends at n = 10, what n value must be deduced?

13

How many total orbitals exist for n = 4?

16

For which atomic orbital does n = 3 and ℓ = 1?

3p Atomic orbitals are described by their principal quantum number (n) followed by a letter that corresponds to the value for the angular momentum quantum number (ℓ). Here, n = 3, so the atomic orbital symbol will begin with 3. The quantum number ℓ = 1 (s = 0, p = 1, d = 2, f = 3), which corresponds to p. Therefore, this is a 3p atomic orbital.

The number of electron groups around an atom with a hybridization of sp3d is a)2 b) 3 c) 4 d) 5

5

For an atom of carbon, which ionization will exhibit a very large increase in the energy relative to the preceding ionization? a)1st b) 2nd c) 3rd d) 4th e) 5th f) 6th

5th

which of the following atoms is paramagnetic? a) Al b) Ba c)Kr d)Zn e)Xe f) He

Al

Name Aluminum nitrate nonahydrate

Al(NO3)2 * 9H2O

Name Be(OH)2

Beryllium Hydroxide

What scientist proposed that the electron in a hydrogen atom can only have certain energies (i.e., the electron is quantized)?

Bohr

Which one of the following substances would have the highest boiling point? a) CO2 b) CH3OH c) CH4 d) Kr

CH3OH

Use MO theory to determine which molecule is diamagnetic a) CO b) B2 c)02 d) none of the above

CO

who formulated the periodic table which grouped elements into families

Dmitri Mendeleev

who formulated the nuclear theory of the atom with his gold foil experiment

Ernest Rutherford

Hydrogen bonds exist between which of the following sets of molecules? a) H2O b) H2 and H2O c) O2 and H2 d) O2 and SO2

H2O and NH3

Which scientist surmised the scientific principle that the position and momentum of an electron cannot be known simultaneously with a high degree of accuracy?

Heisenburg

What quantum mechanics principle states that electrons are added to atomic orbitals with the same energy so that each orbital is singularly occupied with electrons having the same spin?

Hund's Rule

Which substance has the largest heat of vaporization? a) I2 b) Br2 c) Cl2 d) F2

I2

who discovered the electron with his cathode ray tube experiment

J.J Thomson

who came up with an equation to quantify for the visible spectral lines of the hydrogen atom

Johannes Rydberg

who came up with an "atomic theory" which says that matter is composed of tiny particles called atoms

John Dalton

who was the first to propose wave nature of particles (wave-particle duality)

Louis de Broglie

name magnesium nitrate

Mg(NO3)2

Use MO theory to predict which species has the strongest bond a) N2 b) N2- c) N2+ d) all bonds equivalent

N2

A free radical is a molecule with an unpaired "lone" electron. Which of the following is a free radical? a)CO2 b) NO2 c) N2O d) H2O

NO2

who proposed a new model of the atom to allow electrons to jump between discrete energy levels called stationary states

Neils Bohr

De Broglie postulated that the wavelength of a particle is inversely proportional to (mass X velocity) of the particle. The constant of proportionality is:

Planck's constant, h

who did the oil drop experiment which quantified the charge on the electron

Robert millikan

Name Ruthenium (IV) oxide

RuO2

In the photoelectric effect, if the intensity of light shone on a metal increases, what will happen?

There will be more electrons ejected

who proposed a fundamental limit to the precision with which certain pairs of physical properties can be known with is uncertainty principle

Werner Eisenburg

Hund's rule states

When filling degenerate orbitals, electrons fill them singly first, with parallel spins

name xenon tetraflouride

XeF4

according to Coulomb's law, which pair of charged particles has the lowest potential energy? a) a particle with a -1 charge separated by 100 pm from a particle with a +3 charge b) a particle with a -1 charge separated by 150 pm from a particle with a +2 charge c) a particle with a -1 charge separated by 150 pm from a particle with a +1 charge

a particle with a -1 charge separated by 100 pm from a particle with a +3 charge

who proposed the particle nature of light (photons) by explaining the photoelectric effect

albert einstein

a neutral atom has a valence shell with electron configruation ns2. To which family does it belong?

alkaline earth metals

According to MO theory, place the following molecules in order of increasing bond energy, CN,CN+, CN- a) CN<CN+<CN- b)CN+<CN<CN- c)CN<CN-<CN+ d)CN-<CN<CN+

b) CN+ < CN <CN-

Which of the following sets of quantum numbers are possible a) n=3, l=2, ml=-3, ms= +1/2 b) n=3, l=1,ml= -1, ms= -1/2 c) n=2, l=1, ml=-1, ms= 0 d) n=2, l=2, ml= -1, ms= +1/2

b) n=3, l=-1, ms= -1/2

For a dipole-dipole intermolecular force to exist:

both molecules must be polar

Antibonding molecular orbitals are produced by

destructive interaction of atomic orbitals

antibonding moleculer orbitals are produced by

destructive interaction of atomic orbitals

Name N2O5

dinitrogen pentoxide

The trend towards smaller atomic radii as one moved to the right in a period is

due to the effective nuclear charge increasing

true or false: in the photoelectric experiment, increasing the frequency of the irradiation (the light) causes more electrons to be ejected from the metal surface

false: increasing the intensity causes more electrons to be ejected

True or False: Microwaves have more energy than visible light

false: microwaves have more energy than radiowaves

In the Bohr model of the hydrogen atom, the energy required to excite an electron from n = 2 to n = 3 is _______________ the energy required to excite an electron from n = 3 to n = 4?

greater than

The aufbau principle principle states:

in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels

name FeS

iron (II) sulfide

For electrons ejected from a metal surface due to the photoelectric effect, the:

kinetic energy of the ejected electrons increases with an increase in frequency and current increases with an increase in intensity

Red light has a _____ frequency and a _____ wavelength than ultraviolet rays.

lower, longer

The pauli exclusion principle states

no two electrons in an atom can have the same four quantum numbers

sulfur is a: a) metalloid b) metal c) non-metal d) transition metal

non-metal

A bond between a phosphorous and oxygen atom is: a) pure covalent b) non-polar covalent c) polar covalent d) ionic

polar covalent

Which type of electromagnetic radiation has the largest wavelength?

radio waves

What is the correct IUPAC name for AgI?

silver iodide

Name Na2S

sodium sulfide

Which hybridization scheme allows the central atom to form at least one pi bond? a) sp3 b) spd c) sp3d d) sp2

sp2

Which hybridization scheme allows the central atom to form at least one pi bond? a) sp3 b) spd c) sp3d d) sp2

sp2

Which hybridization scheme allows the central atom to form more than four bonds? a) sp3 b) spd c) sp3d d) sp2

sp3d

true or false: solving the schrodinger equation for quantum mechanical systems ( like the hydrogen atom) gives the quantized energies for the system

true

true or false: the double slit experiment illustrated the wave nature of an electron

true

what does ψ² describe?

ψ² describes the probability of finding an electron in space