Which of the following would not have the same number of valence electrons as the others? oxygen carbon sulfur selenium

Option (b) is the correct answer.

Explanation:

Valence electrons is the number of electrons present in the outermost shell. And elements which belong to the same group have same number of valence electrons.

For example, oxygen, sulfur, selenium are all same group elements and they have six valence electrons.

Whereas atomic number of carbon is 6 and its electronic distribution is 2, 4. Therefore, carbon has 4 valence electrons.

Hence, we can conclude that out of the given options, carbon atom would not have the same number of valence electrons as the others.

when it's short and dry.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.