The awareness of protecting natural life increased after great harmful consequences that appeared since the mid-twentieth century. As each species of the plant gets extinct, 30 species of animals that rely on it as...
Non-metals The non-metals are the elements that have more than four electrons in their outermost energy levels, The non-metals are characterized by the smallest atomic sizes and the largest electronegativity.
Metals are elements that are typically: Shiny (lustrous), Good conductors of heat and electricity, Malleable (can be hammered into sheets), Ductile (can be drawn into wires), and Solid at room temperature (except mercury).
The Red List The Red List is a list issued by the international union for conservation of nature (IUCN) every year, and indicates the endangered species, and the endanger level of each case, The...
