question 10 of 25\nwhy do elements in the same period of the periodic table have different properties?\na…

question 10 of 25\nwhy do elements in the same period of the periodic table have different properties?\na. they have different numbers of valence electrons.\nb. they have different arrangements of core electrons.\nc. they have different numbers of neutrons.\nd. they have different arrangements of protons.

question 10 of 25\nwhy do elements in the same period of the periodic table have different properties?\na. they have different numbers of valence electrons.\nb. they have different arrangements of core electrons.\nc. they have different numbers of neutrons.\nd. they have different arrangements of protons.

Answer

Brief Explanations:

Valence electrons determine chemical properties. Elements in the same period have the same number of electron - shells but different numbers of valence electrons, leading to different properties. Core electrons mainly shield the nucleus and are less directly related to the differences in properties among same - period elements. Neutron number affects isotopes and not the basic chemical properties in the context of period differences. Protons are in the nucleus and their arrangement concept is not relevant here.

Answer:

A. They have different numbers of valence electrons.