Chaem 100 exam #2 questions and answers all correct success guaranteed.

Noble gas structure 1) The inertness of the noble gases is due to A) the unique structure of their nuclei. B) the special number of protons and neutrons. C) the bonds they form with other elements. D) the number and arrangement of their electrons. - correct answers D) the number and arrangement of their electrons. 2) A sodium ion Na+, has the same electron configuration as a(n) A) sodium atom. B) chlorine atom. C) neon atom. D) argon atom. - correct answers C) neon atom. 3) A chloride ion Cl- has the same electron configuration as a(n) A) sodium atom. B) chlorine atom. C) neon atom. D) argon atom. - correct answers D) argon atom. 4) The number of electrons in a chloride ion Cl- has the same electron configuration as a(n) A) sodium atom. B) chlorine atom. C) neon atom. D) argon atom. - correct answers C) neon atom. 5) The number of protons in a chloride ion Cl-, is A) 16. B) 17. C) 18. D) 35. - correct answers B) 17. 6) When magnesium reacts with chlorine magnesium ions, Mg2+, and chloride ions, Cl-, are formed. In this reaction, magnesium atoms A) lose electrons. B) gain electrons. C) lose protons. D) gain protons. - correct answers A) lose electrons. 7) When magnesium reacts with chlorinemagnesium ions, Mg2+, and chloride ions, Cl-, are formed. In this reaction, chlorine atoms A) lose electrons. B) gain electrons. C) lose protons. D) gain protons. - correct answers B) gain electrons. 8) When atoms lose or gain electrons in chemical reactions they form A) new atoms. B) noble gases. C) nucleons. D) ions. - correct answers D) ions. 9) With respect to chemical bonding which particles play the most active role? A) protons B) neutrons C) valence electrons D) core electrons - correct answers C) valence electrons 10) An electron-dot structure is a convenient method of representing A) valence electrons of an atom. B) core electrons of an atom. C) all electrons of the atom. D) the complete electron configuration of the atom. - correct answers A) valence electrons of an atom. 11) From the periodic table the number of valence electrons for most of the main group elements may be determined directly from the A) atomic number. B) group number. C) period number. D) nucleon number. Answer - correct answers B) group number. 12) Which is the electron dot structure of magnesium? A) Mg B) C) D) - correct answers ... 13) Which is the electron dot structure of sulfur? A) B) C) D) 2 - correct answers ... 14) Where does an element X with the electron dot structure fit in the periodic table? A) Group 1A B) Group 2A C) Group 3A D) Group 5A - correct answers C) Group 3A 15) Which of the noble gases does NOT have an octet of electrons in its outer shell? A) He B) Ne C) Ar D) Kr - correct answers A) He 16) Sodium chloride NaCl, is a compound. Which of the following statements about NaCl is true? A) It retains some of the properties of sodium. B) It retains some of the properties of chlorine. C) It retains some of the properties of both reactants. D) It has entirely new properties. - correct answers D) It has entirely new properties. 17) The attraction between positive and negative ions is known as a(n) A) covalent bond. B) crystal bond. C) ionic bond. D) molecular bond. - correct answers C) ionic bond. 18) When carbon combines with carbon the bond formed is best classified as A) nonpolar covalent. B) polar covalent. C) metallic. D) ionic. - correct answers A) nonpolar covalent. 19) Which substance has ionic bonds? A) O2 B) CaO C) H2O D) OF2 - correct answers B) CaO 20) Which substance has ionic bonds? A) Cl2 B) NH3 C) H2O D) KBr - correct answers D) KBr 21) A lithium ion is A) Li+. B) Li2+. C) Li-. D) Li2-. - correct answers A) Li+. 22) A nitride ion is A) N+. B) N3+. C) N2-. D) N3-. - correct answers D) N3-. 23) Magnesium reacts with oxygen to form A) MgO. B) Mg2O. C) MgO2.