Question

1. How many electrons can occupy the 4d subshell? 2. What is the electron configuration of AI? 3. The electron configuration for sulfur 4. In terms of atomic structure, what is the common characteristic of elements in the same group? 5. Name an element that has three valence electrons. 6. An ion is Which of the following electron configurations is most stable? A. Is 2s 2p2 B. Is 2s 2p C. Is. 2s 2p+ D.IS, 2s 2p E IS,252 8. Regarding number 7, why? 9. What is the valence shell electron configuration of the stable ion formed from an atom of the halogen family?

I need all please

Answer 1

1. The 4d subshell can occupy maximum 10 electrons because it has 5 orbitals and each can contain two electrons.

2. Electronic configuration of Al is 1s² 2s² 2p⁶ 3s² 3p¹.

3. Electronic configuration of Sulfur is 1s² 2s² 3p⁶ 3s² 3p⁴.

4. In same group, there are same number of outer electrons in the atomic structure of elements of that group and thus have the same valency.

5. Boron element have three valence electrons which is shown by its electronic configuration i.e 1s² 2s² 2p¹.

6. An ion is an atom or molecule which has a net electric charge which comes due to the loss or gain of one or more electrons.

7. option D is the most stable electronic configuration because it is a Noble gas configuration.

8. Because it is a noble gas configuration, it contains the maximum number of electrons in its valence shell.Hence, noble gases rearly react with other elements , that is why they are more stable.

9.Halogen family contains Fluorine, Chlorine, Bromine etc.

The electronic configuration of these elements contain one electron less than that of stable electronic configuration .

For example, Chlorine element form chloride ion by gain of an electron i.e Cl^{​​​​​-}.

Configuration of Chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵

^{​​​​​​}Configuration of chloride ion is 1s² 2s² 2p⁶ 3s² 3p^6.

which is stable.