i did this work :) for chemistry

chemistry
11/12/13
1a. Cr has 24 protons and 24 electrons
1b. Be has 4 protons and 4 electrons
1c. La has 57 protons and 57 electrons

2a. Ar has 18 protons and 18 electrons and 22 newtons
2b. Cl has 17 protons and 17 electrons and 20 newtons
2c. La has 57 protons and 57 electrons and 82 newtons

3. 34 + 41 = 75
                2
4. 4.7 x 10

                14
5. 4.6 x 10

                 19
6. 5.1 x 10

                 14
7. 5.0 x 10

           2      2       6       2       3
8a. 1s 2s 2p 3s 3p

                2      2       6       2       6       2       10        3
9a. 1s 2s 2p 3s 3p 4s 3d 4p

              2      2        6      2       6       2      10        6      2      6
10.1s 2s 2p 3s 3p 4s 3d 4p 5s 4d

                                  2       10      5
11a. [Kr] 5s 4d 5p

                                 2       10      1
12a. [Ar] 4s 3d 4p