If the electronic configurations of atoms A and B are 3s2, 1s2, 2p6, 3s2, 3p1 and 1s2, 2s2, 2p4 respectively, then (a) Which atom forms negative ion ? (b) Which atom forms positive ion ? (c) What is the valency of atom A ? (d) What is the molecular formula of the compound formed by atoms A and B?
Answers
Answer:
question corresponds to phosphorus. If you locate Phosphorus on the periodic table the element below it Arsenic. The answer to your question is Atomic number 33, which is the atomic no. of Arsenic.
Once you know the order of orbitals, you can simply fill them according to the number of electrons in the atom. The order for filling orbitals is as follows: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 8s.
Explanation:
Name of Element : Hydrogen
Atomic Weight : 1.0
Atomic Number : 1
Group : Non-Metals
Electron Configuration: 1s1
Go to the Top of the page.He
Name of Element : Helium
Atomic Weight : 4.0
Atomic Number : 2
Group : Nobel Gases
Electron Configuration: 1s2
Go to the Top of the page.Li
Name of Element : Lithium
Atomic Weight : 6.9
Atomic Number : 3
Group : Alkali Metals
Electron Configuration: 1s2 2s1