Chemistry Common 2. A. Na B. Mg C. Ne D. Ag. 2. In the modern Periodic Table, the elements are arranged in order of increasing
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1 hemistry ommon 2 Name: ate: 1. Which symbol represents an alkaline earth element? 1.. Na. Mg. Ne. g 2. In the modern Periodic Table, the elements are arranged in order of increasing 2.. atomic number. mass number. oxidation number. valence number 3. More than two-thirds of the elements are classified as 3.. nonmetals. metals. metalloids. noble gases 4. Which particle has the largest radius? 4.. F. Ne. l. r 5. s the elements in Group I are considered in order of increasing atomic number, the atomic radius of each successive element increases. This is primarily due to an increase in the number of 5.. neutrons in the nucleus. electrons in the outermost shell. unpaired electrons. principal energy levels 6. Which is the most active nonmetal in the Periodic Table of the Elements? 6.. Na. F. I. l page 1
2 7. s the elements of Group 16 (VI) are considered from top to bottom on the Periodic Table, the covalent radii 7.. increase and the ionization energies decrease. increase and the ionization energies increase. decrease and the ionization energies increase. decrease and the ionization energies decrease 8. Which element in Group 17 (VII) is least likely to lose an electron? 8.. chlorine. iodine. bromine. fluorine 9. The elements that have the most pronounced nonmetallic properties are located toward which corner of the Periodic Table? 9.. upper right. upper left. lower right. lower left 10. Which element in Period 3 has the greatest tendency to gain electrons? 10.. Na. Si. l. r 11. The highest ionization energies in any period are found in Group (I). 2 (II). 17 (VII). 18 (O) 12. s atoms of elements in Group 16 are considered in order from top to bottom, the electronegativity of each successive element 12.. decreases. increases. remains the same page 2 hemistry ommon 2
3 13. Which is the electron dot symbol for a chlorine atom in the ground state? 13.. : l:. l:. :.l:.. l: The correct electron dot formula for hydrogen chloride is 14.. H : l. :.Ḥ: l. H : l:. : H: l: 15. Which electron dot diagram represents H 2? 15.. H. H. H: H. : H..Ḥ:. : H: H: 16. What is the maximum number of electrons that can occupy the second principal energy level? What is the total number of electrons found in the valence shell of a halogen in the the ground state? Which principal energy level can hold a maximum of 18 electrons? Which atom in the ground state has two unpaired electrons in its outermost principal energy level? 19.. Na. Mg. l. Si page 3 hemistry ommon 2
4 20. Which element has a completely filled third principal energy level? 20.. r. N. Fe. Zn 21. sample of element X contains 90 percent 35 X atoms, 8.0 percent 37 X atoms, and 2.0 percent 38 X atoms. The average isotopic mass is closest to The atomic mass of an element is the weighted average of the masses of 22.. its two most abundant isotopes. its two least abundant isotopes. all of its naturally occurring isotopes. all of its radioactive isotopes 23. The atomic number of an atom is always equal to the total number of 23.. neutrons in the nucleus. protons in the nucleus. neutrons plus protons in the atom. protons plus electrons in the atom 24. Which is the atomic number of an atom with six valence electrons? What is the atomic number of an element whose atoms each contain 47 protons, 60 neutrons, and 47 electrons? The atomic number of an alkali metal is page 4 hemistry ommon 2
5 27. In a sample of pure copper, all atoms have atomic numbers which are 27.. the same and the atoms have the same number of electrons. the same but the atoms have a different number of electrons. different but the atoms have the same number of electrons. different and the atoms have a different number of electrons 28. Which atom has a nucleus that contains 13 protons and 14 neutrons? 28.. Mg. e. l. N 29. If the rules for significant figures are observed in the addition example shown, how should the total for this addition be rewritten? , , , , , , Which electron-dot symbol correctly represents an atom of its given element? In the box provided below, draw the electron-dot (Lewis) structure of calcium chloride. 31. page 5 hemistry ommon 2
6 Problem-ttic format version c Educide Software Licensed for use by Ola oker Terms of Use at hemistry ommon 2 09/26/
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