Atomic Stroctore of Chemistry

1 ) 2) 3) What is the electron configuraiton of а gold atom in the ground state? С) 2-8-18-31�18-2 А) 2-8-18-18-1 D) 2-8-18-32-18-2 @2-8-18-32-18-1 h represents the electron configuration of а silver atom in the ground state? С) 2-8-4 В) 2-8-6 � -8-18-18-1 . at is the electron configuration of а calcium ion (Са2;!-) in the ground state? А) 2-8-8-8 1'с})2-8-8 В) 2-8-8-2 D) 2-8-18-17-2 D) 2-8 -8-1 4) Which is the electron configuratюn of а neutral atom ш�ound state w1th а total of six valence electrons? А) 2-7-6 @2-6 С) 2-4 D) 1-8-6 5) What is the electron configuration of an iodine ion (!-) in the ground state? А) 2-8-18-17-9 -8-18-18-8 В) 2-8-18-18-7 (З:)2 nfiguraton of а silver atom in the excited state? Which represents the elect � А) 2-7-7 (!V2-8-18-17-2 С) 2-8-18-18 D) 2-8-18-18-1 Which represents the electron configuraton of а fluorine atom in the excited state? А) 2-8 В) 3-6 �-6-1 D) 2-7 6) 7) 8) What is the electron configuration of а potassium ion in the ground state? ®}2-8-8 В) 2-8-8-8 с;:::::::::С)�8-8-1 ···-� D) 2-8-18-18-6 D) 2-8-8-2 �t is the electron configuration of an phosphorus ion (Р5+) in the ground state? 2-8 В) 2-5 С) 2-8-5 D) 2-7-6 (j) 10) What is the electron configч ton of а calcium atom in the excited state? А) 2-8-8-2 В) 2-8-7-3 С) 2-3-1 D) 2-4 � 11) An atom has the electron con 1guration 2-8-7. The electron dot symbol for this element is С) •Х: D) х: А) х: 9) @:�: 12) What is the total number ofvalence electrons in an atom with the electron configuration 2-8-5? А) 8 С) 2 D) 15 5 13) Which· represents the electron configuration of а silve�g+) in the ground state? А) 2-8-18-18-2 В) 2-8-18-18-1 , 2-8-18-18 D) 2-8-8 What is the electron confi�on of an oxygen ion (О2-) in the ground state? А) 2-6 l_]i 2-8 С) 2-4 D) 1-7 Which electron transition represents the release of eilergy? � А) 2 to 2 , В) 2· • to 3. J to 1. D) 1 to 3 What is the electron configuration of а fluorine atom in the ground state? А) 2-9 В) 1�8 С) 2-8-7 с@2-1 1 4) 15) 16) '® (__9) @ &:, мwrJ Electron Х can change to а higher energy level or а lower energy level. \Ji/hich statement is true of electron Х? 17) А) Electron Х absorЬs energy when it changes to а lower energylevel. �lectron Х absoгbs energy when it changes to а higher епегgу level. '-с) Electron Х neither emits nor absorbs energy when it changes епегgу !evel. D) Electron Х emits епегgу when it changes to а higher energy !evel. 18) What is the tota! number ofvalence electrons in ап atom with the electron configuration 2-8-5? А) 8 В) 2 С) 15 19) Which principal energy level change Ьу the e!ectron of а hydrogen atom wi!! cause the greatest amount of energy to Ье absorЬed? D) п = 4tоп = 2 @п = 2tоп = 5 В) n = 5ton = 2 А) n = 2ton = 4 20) An atom of an e!ement has the e!ectron configuration 2-4. What is the total number ofvalence electrons in this atom? � А) 6 D) 8 С) 2 21) vVhat is the e!ectron configuration of а calcium atom in the ground state? А) 2-8-7-3 В) 2-8-2 С) 2-4 ®5 @-8-8-2 What is the electron configuration of а chloride ion (С!-) in the ground state? А) 2-8-6 С) 2-8-7 В) 2-8 22) G ,�= 23) Wl1at is the еlесtюп dot diagram for ап element witl1 7 ргоtопs? ,,. -:�:; с. х= а. ,\ • 2-1) \\.l1ul is tl1c ekctroп clot diagrшn f'or ап elemeпt \,;it]15 ргоtопs. 5 ekctгoпs. апd 5 пеutгопs'.' а. ' ,.Х; с. , . ь. d. с. 26) What is the e!ectroп dot diagram foI" ап ion witl1 12 ргоtопs. 1 О electroпs. а пd 12 пeutгons? а. с. '1 1 х, 25) What is tl1e е!есtюп dot diagram for an e!ement with 8 rotons, 8 e!ectrons , and � _ 8 neutrons? � С9 !; ! Mg 27) What is the еlесtгоп dot diagram for ап iоп witl1 5 protoпs, 2 electrons, and 5 neutroпs� + ol.. t3 с: а. ь. в: в Не ; ' .1 1• An atom of 226 contains 88Rn � electrons and 226 prot ons. А) 88 electrons апd 226 neutrons �protons and 138 neutrons В) 88 protons апd 138 electrons d-. Different isotopes of the same eJement must have а different С) numberofelectrons • �u-�berofprotons D) atomic number s nшnber � 3�. . • h particle has а mass of approximately one atomic mass unit and а unit posi�ve charge? Ч. С) а neutron D) а beta particle А) proton ) an alpha particle What is the total nшnber of principal energy levels that are completely filled in an atom of magnesium iп .P""'81·uund state? 5, D) С) 3 В) 4 iven the electron configuration of ап atom in the ground state: 2-8-6 1 Tbls element is found in the Periodic ТаЫе in С) Period 3 and Group 14 D) Period 4 апd Group 14 @Period З and Group 16 В) Period 4 and Group 16 Ь, 8 Ап element has an atomic number of 18. What is the principaJ quantum number (п) ofits outeпnost В) 2 С) 1 D) 4 1. Which principal energy level of an atom contains an electron with the lawest energy? '6, А) п = 2 В) п = З С) п=4 crv Which of the following elements has the highest first ionization energy? А) К С) Na С\, What is the electron configuration of а caJciu� atom in the ground state? А) 2-8-2 В) 2-4 �) 2-8-8-2 � \ Q, Which ofthe following particles has the least mass? А) а proton ) ап el rоп С) а deuteron \ \ • Which term refers to the region ofan atom where ап electro�д· '-"!jдL.1�!.t_ А) spectrum В) orЬit С) orЬital �= r'D)n:Y "S..Ju'-.,�-.----;S D) Rb D) 2-8-7-3 D) а neutron D) quantum \ � Ап atom has the electron configuration 2-8-7. The electron dot symbol for this element ,·,,....-�-.. •• А) В) х: С) D) •Х: .. :х: • qie_, 1 �- � How rnany protons are in the nucleus ofan atom ofb� А) 5 В) 2 � 1Ц hе following atoms has the grearest nuclear charge? � fV) OS. � B)r?:,AJ � f- D) 9 pmftn�)rlNa C),fi \�. Experirnental evidence indicates that the nucleus of an atom А) has а negative charge �tains most ofthe mass ofthe atom �ontains а small percentage ofthe mass ofthe atom \ (о . в D) has no charge Тhе valence electrons represented Ьу the electron dot symbol х • could Ье those of atoms in Group А) 16 Accшdiпg to the wave-mechanical mode] of the atom, electroпs in an atom (1) travel in defiпed circles (2) аге шost likek fot111d iп ап excited state _, �н а positi,-� c11ш·gt' ]ocated iп oгhita]s ot1tside tl1e 1шc]eus С!,/" \Vl1icl1 two particles each have а mass appюxi­ mately еqна! to опе atomic mass uпit? ( J.) еlесtгоп апd пепtгоп (2\ еl,-·с-lтоп ш1