9 - 11) Consider the ider the three dimensional illustration of the mo 9) Which

Question

9 - 11) Consider the ider the three dimensional illustration of the mo 9) Which of the four hydrogens (H1, 2, 3 or "in 4) is (are) illustrated as lying in the front of the plane of the page " PLACE ANSWER HERE H 1 10) Which of the four hydrogens (H1, 2, 3 or 4) is (are) illustrated as extending same plane as the page? PLACE ANswER HERE 13 11) Which of the four hydrogens (H1,2, 3 or H 2 H 4 4) is (are) illustrated as extending "behind the plane of the page"? 12 PLACE ANSWER HERE H 3 configuration of n 12) List the names and symbols of the four elements having a valence electron where n = 2, 3, 4, and 5. PLACE ANSWER HERE 13) What is the common name of the group of elements in question 12? PLACE ANSWER HERE common name of the group of elements having a valence electron configuration of np? 14) What is the ns PLACE ANSWER HERE 15) How many electrons are in nitride? c. a. 4 d. none of answers 10 (a through c) is correct 16) Write the complete electron configuration for the noble gas found in the third period. PLACE ANSWER HERE 17) Write the electron complete configuration for nickel. PLACE ANSWER HERE 34

Explanation / Answer

9. H4

10.H3

11.H2

12.nS^2

n=2, ------------- 1s2 2s2. So it is Beryllium atom = Be

n=3 -------------1s2 2s2 2p6 3s2 . So it is the Magnesium atom = Mg

n=4     --------- 1s2 2s2 2p6 3s2 3p6 4s2   . So it is the Calcium = Ca

n=5 ---------    1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 so it is the element is the = Stronium = Sr

13) The common name of the abve elements are Alkaline earth metals.

14.ns2 np5 configaration elements has the common name of ---------- Halogenes.

15.nitride has the formula of N-3. so it has the 7+3 =10 electorns.

16. In the thhird period noble gas the Argon.Ar = 18 = 1s2, 2s2 .2p6, 3s2,3p6.

17,

Atomic number of Nickel = 28 gram/mole

                                      = 1s2 2s2 2p6 3s2 3p6 4s2 3d8 = [Ar] 4s2 3d8

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