Chemistry- Chem 101 Homework (Exam #2)

6

In a ground state atom of Ar how many electrons total will have the quantum number l=0?

1

In n=2, what is the maximum allowed value for l?

will have more attraction to the electrons in a chemical bond

A more electronegative atom

4d

Of the following, which sub level is filled last? A. 3d B. 4s C. 4p D. 4d E. 5s

195nm

Platinum has a work function of 6.35 eV. What is the longest wavelength of light, in nm, that will cause the ejection of electrons? (1 eV= 1.6*10^-19 J)

Ca(ClO3)2

Predict the chemical formula for the ionic compound formed by Ca2+ and ClO3-.

(Nh4)3 PO4

Predict the chemical formula for the ionic coping formed by NH4+ and PO4 3-.

electron affinity

The energy released in the reaction F(g) + e- -> F-(g)is known as the

1s2 2s2 2p6 3s2 3p1

The ground state electron configuration of an Al atom is

True

True or False: Two electrons can simultaneously occupy the same (n,l,ml) orbital.

Fr

What element is theoretically the largest of all on the periodic table? A. Fr B. He C. H D. Pb E. Rn

aluminium nitrite

What is the correct IUPAC name for Al(NO2)3?

iron (III) hydroxide

What is the correct IUPAC name for Fe(OH)3?

phosphoric acid

What is the correct IUPAC name for H3PO4 (aq)?

nitric acid

What is the correct IUPAC name for HNO3 (aq)?

iodine pentafluoride

What is the correct IUPAC name for IF5?

potassium sulfate

What is the correct IUPAC name for K2SO4?

lithium phosphate

What is the correct IUPAC name for Li3PO4?

Dinitrogen tetroxide

What is the correct IUPAC name for N2O4?

sodium hydrogen carbonate

What is the correct IUPAC name for NaHCO3?

phosphorus tribromide

What is the correct IUPAC name for PBr3?

sulfur dichloride

What is the correct IUPAC name for SCl2?

strontium nitrate

What is the correct IUPAC name for Sr(NO3)2?

nitrous acid

What is the correct IUPAC name forHNO2 (aq)?

Trigonal Pyramidal (pyramidal)

What is the correct molecular geometry of NH3 according to Valence Shell Electron Pair Repulsion Theory?

1s2 2s2 2p6 3s2 3p6

What is the electron configuration of K+?

2

What is the maximum number of electrons that can have the following set of quantum numbers? n=2, l=1, ml=1

[Ar] 4s2

What is the noble gas electron configuration of Ca?

Br

Which atom in the Br-F molecule has a partial positive charge?

F

Which atom in the C-F bond has a partial negative charge?

Ge

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2?

Mn

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d5?

Sb

Which element has the ground state electron configuration [Kr] 5s2 4d10 5p3?

F-F

Which of the following bonds is a non polar covalent bond? A. H-F B. N-F C. F-Cl D. F-F

H-Cl

Which of the following bonds is a polar covalent bond? A. Li-Cl B. Cl-Cl C. H-Cl D. Li-Li

S [Ne]3s3 3p4

Which of the following electron configurations is incorrect? A. S [Ne]3s3 3p4 B. Sn[Kr] 5s2 4d10 5p2 C. Rb [Kr] 5s1 D. V [Ar] 4s2 3d3 E. I [Kr] 5s2 4d10 5p5

Cs

Which of the following elements has the smallest first ionization energy? A. S B. O C. Si D. Sr E. Cs

A triple bond

Which of the following has the shortest bond length?

N3-

Which of the following ions has the electron configuration 1s2 2s2 2p6?

color

Which of the following is not a property affected by the effective nuclear charge, Zeff? A. Ionization energy B. Color C. Electron affinity D. atomic radius E. ionic radius

[Ar] 4s2 3d5

Which of the following is the electron configuration for Mn?

A triple bond

Which of the following is the strongest type of bond?

He2

Which of the following molecules is considered least stable according to molecular orbital theory? A. H2- B. H2 C. He2 D. He2+

B2

Which of the following molecules is paramagnetic according to molecular orbital theory? A. H2 B. B2 C. F2 D. N2

n=2, l=2, ml=2

Which of the following quantum numbers is not allowed? A. n=2, l=0, ml=0 B. n=3, l=2, ml=0 C. n=2,l=2, ml=2 D. n=3, l=1, ml=-1 E. n=4, l=2, ml=1

ln3+ < ln+

Which of the following radii comparisons is correct? A. N3- < N B. Ti4+ > Ti3+ C. ln3+ < ln+ D. C4+ > C4- E. As3- < As3+

1s2 2s2 2p6 3s2 3p5

Which of the following represents the electron configuration of S-?

n=3, l=1, ml=1

Which of the following sets of quantum numbers can describe a 3p electron?

n=3, l=0, ml=0

Which of the following sets of quantum numbers could describe electron in the orbital shown below? (Big black sphere)

n=4, l=1, ml=1

Which of the following sets of quantum numbers represents an electron with the highest energy in a multi-electron atom? A. n=4, l=0, ml=0 B. n=3, l=2, ml=-1 C. n=3 ,l=1, ml=0 D. n=2, l=1, ml=-1 E. n=4, l=1, ml=1

s

Which of the following types of electrons penetrates most toward the nucleus and therefore has the greatest shielding effect?

Cl

Which of the following would you expect to have the most negative (most exothermic) electron affinity? A. Si B. S C. Cl D. Sn E. I

4p7

Which of the orbital electron configurations is not possible? A. 2s1 B. 3d10 C. 4p7 D. 4f7 E. 2p6

this is an ionization process

Which of these statements is true concerning the following reaction? Na(g) -> Na+ (g) + e-

B-Cl

Which one of the following bonds has the least ionic character? A. Li-Cl B. Na-Cl C. Ca-Cl D. B-Cl

AlCl3

Which one of the following has the largest lattice energy? A. NaBr B. Kl C. AlCl3 D. Na2O

electron

Which particle would have the longest de Brogile wavelength traveling with the same velocity?

Ionization Energy

Which periodic trend qualifies the amount of energy required to remove an electron from a neutral, gaseous atom?

Fe2+ and Mn3+

All the following pairs of ions are isoelectronic except which one? A. Al3+ and N3- B. Fe2+ and Co3+ C. Fe2+ and Mn 3+ D. K+ and Ca2+ E. Zn2+ and Cu+

l

Given a particular value of principal quantum number (n), which quantum number primarily determines the shape of an orbital?

5

How many orbitals are allowed in the sub shell when l=2?

Cu3 P2

Predict the chemical formula for the ionic compound formed by Cu2+ and P3-.

F, Be, Li, Ba

Rank the following atoms in order of decreasing first ionization energies (highest to lowest): Li, Be, Ba, F.

NH4 OH

Write the chemical formula for ammonium hydroxide.

CaCl2

Write the chemical formula for calcium chloride.

Cr2 S3

Write the chemical formula for chromium (III) sulfide.

CoO

Write the chemical formula for cobalt(II) oxide.

Cl2O7

Write the chemical formula for dichloride heptoxide.

SeF6

Write the chemical formula for hexafluoride.

HF

Write the chemical formula for hydrofluoric acid.

Pb (NO3)2

Write the chemical formula for lead (II) nitrate.

H2SO4

Write the chemical formula for sulfuric acid.

CF4

Write the chemical formula for tetrafluoride.

the true nuclear charge minus the charge that is shielded by electrons

effective nuclear charge, Zeff, is defined as