An element could be a metal.
Inner transiton metals and inner transiton elements... So both a and c
Two elements will form ionic compound if the difference in electronegativity between the two elements is above 1.7 and two elements will form covalent compound if the difference in electronegativity between the two elements is below 1.7 Metals and non-metals will form generally ionic compounds.
metalloids
Metals are elements that are shiny, good conductors of heat and electricity, malleable, and ductile. Nonmetals are elements that are poor conductors of heat and electricity and are brittle in solid form. Metalloids have properties that are intermediate between metals and nonmetals and can exhibit characteristics of both.
metalloids also called semi-metals
An alloy is a mixture of two metals
Scientifically speaking, there are a couple of fundamental differences between heavy metals and other metals in the table of the elements. Heavier metals tend to have more ions and typically, less toxic elements.
Alkali metals belong to Group 1 of the periodic table and include elements like lithium, sodium, and potassium. Group 2 metals are known as alkaline earth metals and include elements like magnesium and calcium. The main difference is that alkali metals are more reactive than Group 2 metals because they have one valence electron, while Group 2 metals have two valence electrons.
Those elements are called metalloids. They have properties that are intermediate between metals and nonmetals.
reactivity
Metals have the greatest number of elements among the classifications mentioned – they include a large majority of the known elements in the periodic table. Non-metals, metalloids, and rare gases have fewer elements in comparison to metals.
Metals are good conductors of heat and electricity, while nonmetals are poor conductors. Metalloids have properties that are intermediate between metals and nonmetals.