The reactivity of elements generally increases as you move down a group on the periodic table. Therefore, the most reactive element among Ga (gallium), Ge (germanium), As (arsenic), and Se (selenium) would be Ga.
which has the most valence electrons? Li Be B or O
Among Li, Be, B, and O, the element with the most valence electrons is O (oxygen). Oxygen has 6 valence electrons.
which is more similar to nitrogen (In Co S or Ts)
The element that is most similar to nitrogen would be phosphorus (P). In the given options, none of the elements (In, Co, S, or Ts) are more similar to nitrogen.
phosphorus is not an answer which is it (In Co S or Ts)
Among the options In (indium), Co (cobalt), S (sulfur), and Ts (tennessine), sulfur (S) is more similar to nitrogen. Both sulfur and nitrogen are nonmetals and they are both in Group 16 (or Group VI) of the periodic table, which means they have similar chemical properties.
which is most reactive N O F or Fe
Among N (nitrogen), O (oxygen), F (fluorine), and Fe (iron), fluorine (F) is the most reactive. Fluorine is the most reactive nonmetal and, being in Group 17 (Group VIIA) of the periodic table, it has a strong tendency to gain or share electrons to achieve a full outer electron shell. Iron (Fe), on the other hand, is a transition metal and its reactivity is lower compared to nonmetals like fluorine.
