Answer:
Valence electrons in an atom of phosphorus in the ground state are found in 3rd shell.
Explanation:
Phosphorus has an atomic number of 15. Its electronic configuration is 2, 8, 5. This configuration implies that, phosphorus electrons are distributed in three different shells and the number of electrons in the outermost shell, which is the third shell, is 5. The ground state refers to a state, where the atoms of phosphorus are not excited. Electrons move away from their ground states when they are excited.
Answer:
You need to give the statements
Explanation:
Lamarck was strong on the inheritance of acquired characteristics but may have placed too much emphasis on this happening in a short period of time like perhaps a few generations. Charles Darwin showed that something similar happened by natural selection of varieties that were favorable to the survival of the species and the extinction of varieties that were not adapted to the natural conditions, but that this process took time but in the end, an organism can develop more favorable traits like mankind when he/she developed the apposable thumb which was an innovation that allowed him to progress from his ape ancestors.
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