Atomic structure Questions and Answers

ich sub shell corresponds to each of the following sets of quantum numbers a n 7 1 2 b n 3 1 0 c n 5 1 3 d n 2 1 1

Choose the one set of quantum numbers that contains an error On 3 1 2 ml 1 On 5 1 3 ml 2 On 3 1 2 ml 0 On 5 1 4 ml 3 On 3 1 0 ml 2

Use the given data to calculate the atomic mass of Chlorine Show your work and use correct number of significant figures Natural Percent Abundance 3517C1 75 7700 3717CL 24 2300 Average Mass 34 9690 36 9660

KProblem Set 3 Ch 2 Exercise 2 57 Enhanced with Feedback MISSED THIS Watch KCV 2 6 Read Section 2 6 You can click on the Review link to access the section in your e Text Part A Which electron is on average closer to the nucleus an electron in a 2s orbital or an electron in a 3s orbital Match the items in the left column to the appropriate blanks in the sentences on the right 3s 28 increases decreases my The size of the orbital is determined by the Reset Help quantum number so the size of the orbital as this value increases Therefore an electron in a orbital is closer to orbital the nucleus than is an electron in a

Match each rule or principle with the correct description At most two electrons may occupy an orbital and they have opposite spins Start at 1s and build up from there into higher energy levels In each level electrons first fill singly before doubling up Choose Choose The Bohr model principle The Heisenberg uncertainty principle The Pauli exclusion principle Hund s rule The quantum mechanical rule

Which of the following statements is are true Select all that apply 2 The 2s orbital of a helium atom is lower in energy than a 2p orbital in the hydrogen atom At a given energy level the d orbital electrons can penetrate to the nucleus more than the s orbital electro O Outer shell electrons are shielded from the nucleus by inner shell electrons The 2s orbital of a hydrogen atom is lower in energy than a 2p orbital in the hydrogen atom None of the above statements is true

Match the scientist in the left column with the proper description in the right colur Clear All Johann Dobereiner John Newlands Julius Lothar Meyer Dimitri Mendeleev Emphasized how useful the table could be in predicting the existence and properties of still unknown elements Suggested elements should be arranged in octaves First chemist to recognize patterns between elements and properties German chemist who conceived of the present form of the

Atoms become more stable with eight electrons in their outer energy level Select one O a Opposite ions repulsion O b Protons are shared between atoms O c A proton is transferred from one atom to another Od Two atoms share a pair of electrons

19 9 g 0 Express your answer in molecules to three significant figures

Use the molecular orbital diagram shown to determine which of the following are paramagnetic Atomic orbitals 2p 2s F 2 O Ne 0 2 Molecular orbitals Pip P2P 52p 25 0 F Ne 2s Atomic orbitals 2p

2 The molecular orbital for He and He2 are shown here What are the bond orders of He22 and He2 respectively Energy 015 H H 015 015 015

List all possible values of the angular momentum quantum number for an electron in the K n 1 shell of an atom 1 0 0 0

4 03 ActivitySeries pdf Minimize File Preview Li Rb K Ba Ca Na Mg Al Mn Zn Cr Fe Co Ni Sn Pb H Cu Ag Hg Reference Activity Series react with cold water and acids replacing hydrogen react with acids or steam but usually not liquid water to replace hydrogen react with acids but not water to replace hydrogen reference point react with O to form oxides ZOOM Increasing Reactivity

13 5 points A solution is prepared by mixing 0 2130 moles of NaNO3 with 212 6 g of water Its density is 1 137 g mL 1 If Kf 1 87 C m1 and the solute is completely ionized what is th expected freezing point of the solution Do not report units in your answer Report your answer with two places past the decimal point Incorrect sign won t receive credits

Choose the best Lewis stru Cl Cl I C cl cl ci ci C Cl ci Cl ci ci CI cia

Consider the balanced reaction below Pb NO3 2 Na2 CrO4 PbCrO4 2NaNO3 How many moles of sodium nitrate NaNO3 would be produced from the complete reaction of 253 g sodium chromate Na2CrO4

Atoms of the same element that have different numbers of neutrons are called isotopes

17 4 points The reaction 2SO3 g 2SO2 g O2 g is endothermic Predict what will happen if the temperature is decreased Kc increases Ke remains the same more SO g is produced Kc decreases FOOOO0

9 Which of the following terms is defined as rules regarding one person s authority o act on behalf of another a adverse possession b agency law c Recovery Act d mechanic s lien

Part A Which set of quantum numbers cannot specify an orbital On 4 1 2 mi 0 On 3 1 3 mi 0 On 3 1 1 m 1 O n 2 1 0 mi 0 Submit

A How much energy is required to ionize a hydrogen atom containing an electron in the n 3 level Express your answer in joules to three significant figures E Submit Part B VAX Request Answer J What wavelength of light contains enough energy in a single photon to lonize a hydrogen atom Express your answer in nanometers to three significant figures

15 5 points At 26 9 C the vapor pressure of npropyl mercaptan C3H7SH is 182 torr while that of acetonitrile CH3CN is 112 torr What is the vapor pressure at 26 9 C of a solution made by mixing 78 7 g of C3H7SH and 92 6 g CH3CN if Raoult s Law is obeyed Do not report units in your answer Report your answer with one decimal place past the decimal point Typovour ong

Spell out the full name of the compound Submit Part B K S Spell out the full name of the compound Submit Request Answer Part C Request Answer NaBr Spell out the full name of the compound

MISSED THIS Read Section 3 7 You can click on the Review link to access the section in your e Text Consider the following set of successive ionization energies IE 578 kJ mol IE2 1 820 kJ mol IES 2 750 kJ mol IE 11 600 kJ mol To which third period element do these lonization values be Express your answer as an element symbol Submit Request Answer

If someone eats 175 calories of fiber in their normal 2500 calorie daily diet what is the percent fiber part whole x 100 in their diet Calculator answer

Calculate molar mass o Mn SO4 2

Linear electron configuration for Molybdenum

Calculate the energy of the red light emitted by a neon atom with a wavelength of 560 0 nm Hint h 6 626 10 34 c 3 0 108 m s O 3 55 x 10 19 J 2 78 x 10 19 J 1 92 10 19 J 4 54 x 10 19 J 7 21 10 19 J Question 32 2 5 points Listen A shell consists of all orbitals with the same quantum numbers electrons with the same magnetic quantum number electrons with the same quantum number orbitals with the same principal quantum number Js

Which statement below regarding ionization energy is FALSE lonization energies are always positive because it takes energy to pull the negative electron away from the positive nucleus Atoms in the same column of the periodic table have equal ionization energies Anomalies in ionization energy trends can occur due to electron pairing in orbitals lonization energy is the energy required to remove a mole of electrons from a mole of gas phase atoms or ions The ionization energy increases as Zeff increases

a mercury lamp with a frequency of 6 32 1014 Hz Hint the speed of light 3 00 x 108 m s 190 nm 475 nm 385 nm 211 nm Question 26 2 5 points Listen Which set of three quantum numbers does not specify an orbital in the hydrogen atom n 2 1 1 m 1 On 1 1 0 m 0 On 3 1 1 m 1 On 7 1 3 m 0

Which wavelength of light has the highest frequency 20 mm 20 cm 20 km 20 pm 20 nm Question 30 2 5 points 1 Listen The uncertainty principle states that we can never know both the exact location and speed of an electron True

Which transition results in emitted light with the shortest wavelength n 5 n 2 n 4 n 3 n 5 n 3 n 5 n 4

Oorbitals with the same quantum numbers electrons with the same magnetic quantum nur Oorbitals with the same principal quantum numb electrons with the same quantum number

Identify the species that has the largest radius ON 3 ON 2 ON 5 O NO ON 1

Predict the charge that an aluminum ion would have O 1 02 0 2 O3 3

O ulate the de Broglie wavelength of a 142 g baseball thrown at 44 m s 5 46 x 10 34 m O 3 86 x 10 14 m 2 89 x 10 34 m 1 06 x 10 34 m 1 67 x 10 34 m

tends to lose electrons Obad conductor of electricity found on the left side of the periodic table forms ionic compounds with nonmetals O good conductor of heat Question 8 2 5 points Listen Which reaction below represents the first ionization of O OO g e O g O g e O2 g O g O g e O g O g e

Which set of three quantum numbers does not specify an orbital in the hydrogen atom n 1 1 0 m 0 On 2 1 0 m 1 On 2 1 1 m 1 On 7 1 3 m 0 n 3 1 1 m 1

Place the following elements in order of decreasing atomic radius 1 the largest atomic radius 3 the smallest atomic radius AI

What are the principal and angular momentum quantum numbers for a 4f orbital n 4 3 On 4 1 4 On 3 1 4 On 4 1 1 On 4 1 2

Which statement about Rutherford s model of the atom is NOT correct It suggested that most of the atom is empty space It suggested that the positive charge is not spread out over the atom s entire volume but rather is concentrated in the nucleus It detailed the arrangement of electrons in the atom It did not explain some experimental findings such as the photoelectric effect and the colors of light emitted by heated objects It hypothesized that most of the mass of the atom is located in a very small region at the center of the atom called the nucleus

Arrange the atoms or ions in order of increasing 1 smallest to 4 largest value of the indicated property Ionization Energy F Ne Na Mg 1 v Na Ne F LL Ma

Draw a picture of each of the 5 atomic models For each picture Label the name of the model tell which scientist made the model what new scientific information inspired it and give a brief explaination of the model alternately you may also label the parts of the model and explain how it works

Will the following energy changes be high or low Ca losing 1 electron Ca losing 2 electrons Ca losing 3 electrons and is bei all

5F2 g 2NH3 g N F4 g 6HF g If you had 66 6 g of NH3 how many grams of F2 are needed to complete the reaction

List the five properties of metals What do we call a homogenous mixture of two or more metals

3 How many moles of Li N are created from the reaction of 75 moles of Li 1 Show Worky 1 Final Answer 4 How many grams of Li N are produced from the reaction of 76 molecules of N 1 Show Work 1 Final Answer 5 How many grams of Li N are produced from the reaction of 8 6 moles of N 1 Show Worky 1 Final Answe

Strontium his heated and a red flame is produced Explain what is happening from an electron point of view

How many valence electrons do atoms desire to have What group has this number of valance electrons Is this group reactive or non reactive

What is the order with respect to each reactant and the overall order of the react described by the following rate expressions reactant order s overall reaction order a rate K A b rate k A B c rate k A B d rate k B e rate k