I believe it's halogens
Electronegativity - capacity to loss electrons - is representative for the reactivity of chemical elements; for metals low electronegativity is a high reactivity.
Nonmetals are elements that tend to gain electrons in chemical reactions. They typically form negative ions (anions) by accepting electrons from other elements. Nonmetals are generally located on the right side of the periodic table.
Lead has low reactivity because it is a stable metal with a full outer electron shell. It does not readily react with other elements or compounds at moderate temperatures.
The halogen family of elements is located in Group 17 of the periodic table. This group includes the elements fluorine, chlorine, bromine, iodine, and astatine. Halogens are known for their high reactivity and tendency to form salts when combined with metals. They are found in various states at room temperature, with fluorine and chlorine as gases, bromine as a liquid, and iodine as a solid.
Three elements in the same family, specifically in Group 1 of the periodic table, are lithium (Li), sodium (Na), and potassium (K). These elements are all alkali metals, characterized by their high reactivity, particularly with water, and their tendency to form strong bases when reacting with acids. They each have one electron in their outermost shell, which they readily lose to form positive ions.
The nonmetal group containing chlorine and iodine is the halogen group, which is located in group 17 of the periodic table. Halogens have high reactivity and readily form compounds with other elements. Chlorine and iodine, along with fluorine and bromine, are known members of this group.
Bromine, chlorine, and fluorine are examples of halogens, which are a group of reactive nonmetal elements located in group 17 of the periodic table. They are known for their high reactivity and ability to form salts with metals.
HON stands for "Halogens, Oxygen, Nitrogen" - which are the most electronegative elements in the periodic table. In organic chemistry, functional groups containing halogens, oxygen, or nitrogen are often referred to as HON functional groups due to their high reactivity and importance in determining the chemical properties of a molecule.
Electronegativity - capacity to loss electrons - is representative for the reactivity of chemical elements; for metals low electronegativity is a high reactivity.
Very reactive elements are alkali metals and halogens.
The other highly reactive element in period 2 is fluorine, a non-metal. Both lithium and fluorine readily form compounds due to their high reactivity.
Potassium is an example of a substance with high reactivity due to its tendency to readily react with water or oxygen. This reactivity is due to its outer electron configuration, which makes it highly reactive in forming bonds with other elements.
Oxygen stays as diatomic molecules in the atmosphere. These 2 oxygen atoms are bond with a double bond. So reactivity of oxygen is low.
neon is a noble gas therefore its a non metal
Bromine is a nonmetal because it lacks the properties of a metal, such as high electrical conductivity and malleability. It is instead a halogen in group 17 of the periodic table, sharing characteristics like low melting point and high reactivity with other nonmetals.
Nonmetals are elements that tend to gain electrons in chemical reactions. They typically form negative ions (anions) by accepting electrons from other elements. Nonmetals are generally located on the right side of the periodic table.
Fluorine, chlorine, bromine, iodine, and astatine. All of the elements in the halogen family are nonmetals.