Atomic structure Questions and Answers

How many electrons can be found in a 4f orbital

Quantum Numbers and Ele What are the quantum numbers for the elements in the 3d block

How many electrons in an atom can have the following set of quantum numbers n 4 1 3 m 2 ms 1 2

67 2 points An electromagnetic wave has a frequency of 8 78 x 1015 Hz or s 1 What is the wavelength in nm of this wave Given the speed of light is 3 00 x 108 m s and 1 nm 1x 10 9 m Answer in integer Type your answer

Write the chemical symbols for three different atoms or atomic cations with 18 electrons 000 X 0 0 5

Which of the following best describes how an ionic compound dissolves in water O It separates into individual molecules and is a non electrolyte OIt breaks into its individual ions and is an electrolyte O It separates into individual molecules and is an electrolyte It breaks into its individual ions and is a non electrolyte

If an electron falls from the n 2 to the n 1 energy levels in a Hydrogen atom what wavelength of light is emitted O 122 nm 97 nm 103 nm 1024 nm

What do elements in a row have in common the same number of electron shells Every element in Period 1 1st row has 1 shell for its electron H He All of the elements in period 2 have two shells for their electrons It continues like this all the way down the table 151 I 80 And You ve got your Column group families What do elements in a group have in common same number of valence electrons electrons in the outer shel Every element in group 1 1st column has 1 valence electron Every element in group 2 has 2 valence electrons In fact if you know the group s number you automatically know how many valence electrons it has Metals Metalloids Nonmetals Metals 10 11 12 Nonmetals 13 14 15 16 17 18

There are 4 wavelengths that are emitted from a Hydrogen atom that can be seen by the human eye Two of the wavelengths are the same color What colors are they Orange Yellow and Green Red Orange and Yellow Blue Indigo and Violet 1 5 pts Red Blue and Violet

Which is always going to be the highest ionization energy 1st lonization energy All lonization energies are equal 3rd lonization Energy 2nd lonization Energy

Which area of the periodic table has the most elements included within it Metals Transition Metals Nonmetals Metalloids

2 Give the number of protons electrons and neutrons that make up the following atoms 23 Na 40 Ar 55Fe d 238Pu C a b

c 2HCl H Cl Which has more mass 100 hydrogen atoms 4 sulfur atoms or 1 lanthanum La ate

5 What is the wavelength of light that has frequency of 6 15x10 4Hz TIN TH

Calculate the mass of precipitate formed in grams when aqueous solutions of the following reactants are mixed Assume the reaction goes to completion 9 50 g of sodium sulfate and 35 7 mL of 0 525 M barium chloride Do NOT include units in your answer If you round during your calculations make sure to keep at least four 4 decimal places Report your final answer to two 2 decimal places

2 points In Molecular Orbital Theory when the combination of two atomic orbitals creating a region of electron density is directly between the two nuclei is the bonding orbital True False Next

of the electron in motion also has a wavelength of 579 8 nm what is the speed of the electron in m s Given the mass of the electron is 9 109 x 10 31 kg and h 6 63 x 10 34 J s

0 of 1 point earned 1 attempt remaining A

Write the complete ground state electron configuration of copper

How many protons neutrons and electrons are in one atom of zinc 70 A 30 protons 40 neutrons and 30 electrons B 30 protons 70 neutrons and 40 electrons 40 protons 30 neutrons and 40 electrons D 70 protons 30 neutrons and 30 electrons

What is wrong with the following electron configurations a 1s 2s 2p b 1s 2s 2p Includ TsOd 3s 3p6 4s 3d8 4p6 5s c 1s 2s 2p 3s 3p6 4s 3d 0 4p6 4d 0 5s otnoj odr bidin molboe

How many protons and electrons are in the following atoms a beryllium b Platinum c argon d tin Tabumon ai quloveb anoi

7 Give the abbreviated electron configuration for the following atoms a P geconouls griessioni to b Mo c Ba

Consider the following equation Mg OH 2 s 2 HBr aq MgBr2 aq 2 H O 1 How many grams of water are formed when 2 99 moles of Mg OH 2 react w HBr Only write the numerical answer with the appropriate number of significant figures for this question no units substance pococcand

Which statement is true about the limiting reactant a It is the reactant which has the least mass s It is the substance with the smallest meda b It is the reactant which has the least molar mass d It is completely used up in a reaction Which statement is true about the excess reactant a It is not completely used up in a reaction c It is the substance with the largest molar mass d It is the reactant which has the most mass b It is always one of the products

A diatomic molecule has a force constant k of 639 9 Nm 1 and a reduced mass 1 565 x 10 27 kg Predict the location of the vibrational absorption peaks in cm Provide your numerical answer with 1 decimal place

Which pair shares the same empirical formula O C H and C H O C H and C H4 O CH2 and C6H6 OCH and C H4

A system receives 80 0 J of heat from its surrounding and the surrounding has done work on the system exerting 3 00atm of pressure As the surrounding done work on the system it decreases its temperature from 50 0 C to 25 0 C What is the value of AE

Erwin Schr dinger Solution of the Schr dinger wave equation for the hydrogen atom results in a set of functions orbitals that describe the behavior of the electron Each function is characterized by 3 quantum numbers n I and m n is known as the is known as the m is known as the n specifies specifies my specifies quantum number quantum number quantum number A The subshell orbital shape B The energy and average distance from the nucleus

True or False Select gas configurations Select Select an ion of group 2A elements Select of group 2A elements Select V an ion of group 2A elements V The electron configuration of group 2A ions 2 charge have noble Pb2 ion has electron confuguration of Xe 6s24f145d106p Group 2A hydroxides have a general formula of ROH where R is Group 2A oxides have a general formula of RO where R is an ion Group 2A oxalate have a general formula of R C2O4 where R is

Which of these elements has the greatest atomic radius A H B N CI D Cs C OC OD I Z O A REL

What is the wavelength of light in mm for a photon with a frequency of 329 0 MHz Remember that 1 mm 10 3 m 1 MHz 106 Hz and that the speed of light is 2 998 108 m s Your Answer

For each of the following groups place the atoms and or ions in order of decreasing size a Cu Cut Cu Cu Drag and drop your selection from the following list to complete the answer Cu Cu b Fe Fe Fe decreasing size Fe decreasing size Drag and drop your selection from the following list to complete the answer Fe Fe

Identify which of the following compounds contain hydrogen bonds select all that apply OHF H 0 ON2 OH S Submit Question

1 What is the number of electrons in the outermost occupied energy level of an element in Group 5A 2 The electron configuration of calcium is 3 Why are the noble gages so unreactive

For the reaction H g I g 2 HI g at 425 C calculate HI given H 12 0 000578 mol L and K 54 3 Answer in units of mol L

Given the energy levels of elections in a hydrogen atom shown Electron Energy Levels in Hydrogen In the table arrange the photons emitted by the electron ransitions from longest wavelength to shortest wavelength n 2 n 3 Energy level n 1 Energy eV E 13 6 E2 3 4 E3 1 5 E4 0 n 4 Longest wavelength Shortest wavelength Answer Bank

Which of the following substances is a base O NO3 O C H5OH O NH4 O NH3 KCI

Use the periodic table to determin number of 2p electrons Use the periodic table to determine the number of 3p electrons in P number of 3p electrons Use the periodic table to determine the number of 3d electrons in Sc number of 3d electrons Use the periodic table to determine the number of 4p electrons in Br

Reaction Calcium chloride reacts with sodium carbonate to form sodium chloride and calcium carbonate 86 22g of sodium chloride and 66 05g of calcium carbonate form during a reaction If 19 14g of sodium carbonate was fully reacted what mass in grams of calcium chloride was fully reacted This is not a real reaction

2 points Which species below has eight valence electrons in its Lewis symbol 00 Si p2 CI Na

Prior Knowledge Questions The chart below gives the locations charges and approximate masses of three subatomic particles The approximate mass of each particle is given in universal mass units u Particle Proton Neutron Electron Location Nucleus Nucleus Orbitals Charge 1 0 Blank 1 1 Approximate mass 1u 1u Ou a The mass number of an atom is equal to the sum of protons and neutrons in the nucleus A helium atom has 2 protons and 2 neutrons What is the mass number of this atom 7 b The atomic number of an element is equal to the number of protons in each atom of the element All helium atoms have 2 protons What is the atomic number of helium

c Which atom is sp hybridized d How many or bonds are in the molecule e How many bonds are in the molecule f What is the N N N bond angle in the azide N group 8 9 What is the HOC bond angle in the side group attached to the five membered ring h What is the hybridization of the oxygen atom in the CH OH group Drag and drop your selection from the following list to complete the answer

Arrange the following species in order of decreasing C O bond order Highest Bond Order 2 3 1 HCO CO3 CO 4 CO

2 4 points Select the examples in which the electron configurations correctly match the given ions select all that apply wrong choices will be penalized Sn 2 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 4d 10 5p 2 s 1s 2 2s 2 2p 6 3s 2 3p6 Mg2 Ne Ti 1s 2 2s 2p 63s 3p64s Al Ne 3s 2 3p 1 Br 1s 2s 2 2p 6 3s 2 3p 64s 3d 10 4p 6 10 Pb2 Xe 4f14 5d 6s 2 p3 1s 2 2s 2 2p 6 3s 3p 6 02 1s 2 2s 2 2p 4 6 Cr 1s22s 2p 3s 23p6 3d 4 4s

Choose the correct Lewis structure for XeF A O B O C O D O KE Xe Xe 4 8 F Xe F F X 4 F Xe F RE 6 te Select one answer 6 points

mmarize In general how can you determine the mass number of the daughter product after alpha decay has take ce How can you determine the atomic number Da Adding or Subtracting the Correct Numbers Ob Using Nuclear Chemistry Equations Using Gizmos Making the Proper Observations and Calculations All the Above None of the Above C e f 2

How many orbitals in an atom could have these sets of quantum numbers n 2 n 5 6 0 O orb

1 All atoms of the same element have the same number of 2 An atom of an element with atomic number 48 and mass number 120 contains protons electrons and neutrons 3 What is the atomic number and the mass number of an atom of an element with 11 protons and 12 neutrons Clare neutrons The second one has 4 Cl and of each other The first one has protons and neutrons protons and

For each of the following elements write out a linear electron configuration noble gas abbreviated configuration and a dash method abbreviation Nitrogen Sodium Phosphorus Argon Calcium Nickle Bromine Mercury