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lJr nors ehe mistry -Ato ms fy [-l"me nts Y ructice [*rt \,i!r. ffiatthew fotaro .nd \,,1.. $h.*n fruche t MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which statement below accurately describes the contributions of Dalton? A) proposed the modern Atomic Theory B) ancient Greek philosopher who proposed that matter was continuous C) created the modem periodic table D) discovered the existence of eiectrons E) none of the above 2) \A4rich of the statements about the discovery of electrons is FALSE? A) The negatively charged electron is located outside the nucleus. B) Because atoms are neutral, the existence of a negatively charged particle implied there must be a positively charged component of an atom. C) Thomson proposed that electrons were small particles held within a positively charged sphere. D) Rutherford proved the plum-pudding model correct. E) All of the above statements are true. 3) The Rutherford goid foil experiment demonstrated that atoms A) are visible to the naked eye. B) consist of a dense nucleus surrounded by mostly empty space. C) are homogeneous. D) consist of a single type of subatomic particle. E) consist of an almost empty nucleus surrounded by a dense cloud of electrons. 4) \Mhich of the following pairs of subatomic particles have charges of equal magnitude but opposite in sign? A) proton and electron B) gamma ray and neutron C) neutron and proton D) proton and positron E) electron and neutron 5) The correct symbol for the isotope of potassium with22 neutrons is 19 nr'41 t< ..K '19 i1 R} 22x ct'19 15 D)'"P J/ aa E)"P '15 6) The correct symbol for a uranium atom with a mass number of 235 is ??q A);;U qTf" 327 ct'92 u -"- IIr D),9? i43 '92 u Er 7 7) How many electrons are in Br-? A)4 B) 34 c)36 D)7 E) none of the above 8) Which of the following is NOT true for the atoms 131q, 145, and 15N? A) They all have 7 protons. B) They all have 7 electrons. C) They are isotopes. D) They all have the same mass number. E) They all have the same atomic number. 9) Vfhich of the statements about light is FALSE? A) A characteristic feature of light that determines its color is its wavelength. B) Light travels through space at a speed of 3.00 C) Light travels much faster than sound. D) A packet of light energy is called a photon. E) A11 of the above statements are true. , 108 m/s. 10) The number of cycles of a wave that passes a stationary point in one second is called its A) wavelength B) frequency C) trough D) crest E) none of the above 11) \A4rich color of the visible spectrum has the longest wavelength (750 nm)? A)yellow B) violet C) orange D) green E) red 12) What is the correct order of the electromagnetic spectrum from shortest wavelength to longest? A) Gamma Rays-X-rays-Visible Light-Ultraviolet Radiation-Infrared Radiation--Microwaves--Radio Waves B) Gamma Rays-X-rays-Ultraviolet Radiation-Visible Light-Infrared Radiation-Microwaves-Radio Waves C) Visible Light-Infrared Radiation-Microwaves-Radio Waves-Gamma Rays--X-rays-Ultraviolet Radiation D) Radio Waves-X-rays-Ultraviolet Radiation-Visible Light-Infrared Radiation-Microwaves-Gamma Rays E) Camma Waves Rays-X-rays-lnfrared Radiation-Visible Light-Ultraviolet Radiation-Microwaves-Radio 13) V\hat is the frequency (Hz) of electromagnetic radiation that has a wavelength of 0.53 m? A) 5.2 , 108 B) 1.8 * 10-9 C) 1.3 , tg33 D) 1.6 " 108 14)Theenergyofaphotonthathasafrequencyof8'21'1015Hzis-I. A) s.os , 10-50 B) Lz6, 10-19 C) 5.44, 10-18 D) 7.24,1049 E) 1.3 , 10-33 E) 7.99 ,70-25 white light is passed through a prism, what is observed? A) continuous spectrum B) black light C) bright spots and lines D)nothing 15) \A4ren E) none of the above 16) What happens to an atom when it absorbs energy? A) The atom re-emits the energy B) C) D) E) heat. of the electrons in their orbitals speed The extra energy increases the The atom re-emits the energy as light. The atom stores the energy for later use. none of the above 17) The atomic as orbital depicted below would be found in sublevel. a A) c) 4f B) 2s 6p D) 5d 18) V\4rich electron configuration represents a violation of the Pauli exclusion principie? A) ls Lb t;; 6il l,1l l'*l lt!t B) c) D) E) n m flal il 1s ?s 2p ls 2s 2p ru f;; 1s il t;; l,ti t^ 2s m tl I I Li*Y_l [; tlgJ t T 2p TT E) 3p 19) lA4rich of the following denotes an orbital diagram for a boron atom? A) tis 1* tll [?TJ B) 't^ l:3 c) l.* m 1x ? iTT 2p ffit l_'l ?trtr 3s ?p ru ?ilfI? r*l**-1 tT J ?p I D) lx t;**l rul lll E) ?e ?s 3p ru IITJ T 20) The electron configuration of Ga is X1 rc2 Z s2 Zp6 Y2 3 p6 B) [Ar]4s23411 C) rc2 z s2 zpQ s2 3pQ D) E) _. 4s2 441 0 4p 1 4.70 4s2 4p1 t s2 Z s2 3 s2 3 p6 g 670 42 4r7 7 s2 Z grfu 6,1 0 4t2 46,1 s2 Zp6 g "2 21) What is the electron configuration for potassium (atomic number 19)? A) 1s2 2s2 2p6 352 3p5 342 B) 7s2 Zs2 2p8 3s2 3pS C) ts2 2s2 2p6 352 gp6 4s1' D) 7s2 2s2 2p6 3s2 3p7 E) U2 Zs2 2p6 3e2 3p 5 4s1 22) What element has the electron configuratio B) Be A) Na n 1s2 2s2 2p6 3s2 z c) si D)Mg E) Ca 23) The correct electron configuration for chromium is A) 7s2zs2zp6Y2gp@46 B) ts2Zs2Zp63s23p6 C) 7 D) t s2 2s2 Zp6 s2 Z s2 zp6 Y2 3p6 4s2 3 64 Y23 p6 42 3 d10 4p1 El7s2Zs2zpQs2 24) Vfhich of the following electron configurations is incorrecf as written? x1 ts2zs2zp6zr2zp6 B) 7 sz 2 s2 2p6 z rz z p6 z d7o c) k22s22p63s2 o7 l s2 zs2 zp *2 E) k2 2s2 2p6 2p z 12 12 2p *2 3 12 zp6 +r2 z dlo +p4 25) How many valence electrons are in a bromine atom? A) B) 17 i c)10 D)7 E) none of the above Answer Key Testname: HONORS CHEMISTRY - ATOMS & ELEMENTS PRACTICE EXAM 1)A 2)D 3)B 4)A 5)B 6) B 7)C 8) D e) E 10) B 11) E 72) B 13) A 14) C 15) A 16) C 17)D 18) A 1e) E 20) c 21) C 22)D 23) C 24) B 25)D