41) Elements in Group 2A are known as the A) alkaline earth metals B) alkali met

Question

41) Elements in Group 2A are known as the A) alkaline earth metals B) alkali metals C) chalcogens D) halogens E) noble gases 42) Elements in Group 7A are known as the A) chalcogens B) alkali metals C) alkaline earth metals D) halogens E) noble gases 43) Elements in Group 8A are known as the A) halogens B) alkali metals C) alkaline earth metals D) chalcogens E) noble gases and chlorine is a 44) Potassium is a A) metal, nonmetal B) metal, metal C) metal, metalloid D) metalloid, nonmetal E) nonmetal, metal typically form ions with a 2+ charge. 45) A) Alkaline earth metals B) Halogens C) Chalcogens D) Alkali metals E) Transition metals 46) The charge on the manganese in the salt MnE, is A) +1 B)-1 C)+2 D) -2 47) Sodium forms an ion with a charge of A) +1 B) -1 C) +2 D) -2 48) How many atoms (total) are there in one formula unit of Mg(O)? A) 3 B) 4 C) 5 D) 6

Explanation / Answer

41. (A)ALKALINE EARTH METAL

42. (D) HALOGEN

43.(E) NOBLE GAS

44. (A) K Is metal while CL is nonmetal

45.(A) alkaline earth

46.(A) +1

47.(C) one magnesium atom, two oxygen atoms and two hydrogen atoms

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