Question

Write the standard electron configuration for the following:

1. Carbon(C)

2. Lead (Pb)

2. Write the noble gas electron configuration for the following:

       a.   Strontium (Sr)

       b.   Iodine (I)

3. What element is represented by each of the following electron configurations?

a. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d⁸

b. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p³

4. Draw the Orbital Diagram for the configuration you wrote for LEAD in the problem #1b.

5. How many valence electrons does Sodium have?

       a. 2             b. 1

       c. 7             d. 8

6. How many valence electrons does Aluminum have?

       a. 7             b. 3

       c. 4             d. 2

7. Draw the Lewis Dot diagram for each of the following elements:

            a. Arsenic (As)

            b. Strontium (Sr)

Draw the orbital diagram and dot diagram for Copper (Cu).

Answer 1

1. a. Carbon atomic number is 6

E.C. - 1s2 2s2 2p2

b. Lead atomic number is 82

E.C. -

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p2

2. a. Strontium atomic number is 38

Nobal gas electronic configuration is [Kr]5s2.

b . Iodine atomic number is 53

Nobal gas E.C is [Kr]4d10 5s2 5p5.

3. a. 1s22s22p63s23p64s23d104p65s24d105p66s24f145d8

Number of electrons in above E.C is 78 which represents Platinum element.

b.1s22s22p63s23p64s23d104p65s24d105p3

Number of electrons in above E.C. is 51 which represents Antimony element.

4. Orbital digram of lead.

5. Sodium atomic number is 11

EC. - 1s2 2s2 2p6 3s1.

Outer most shell contain 1 electron hence valence electron of Na is b. 1.

6. Aluminium atomic number is 13

E.C. - 1s2 2s2 2p6 3s2 3p1

Outer most shell contain 3 elctrons hence valence electron is =b. 3

7.a Arsenic lewis dot structure is as follows.

b. Strontium lewis dot structure is as follows

Orbital digram of copper is as follows

its dot structure can not b drawn cause it is n d block element.