The modern periodic table is a systematic arrangement of elements based on their atomic number, which reveals clear patterns in their physical and chemical properties. One of the most important trends observed in this...
Protecting living organisms from extinction has become one of the most important challenges facing our world today. Awareness of the need to protect natural life increased following the severe adverse effects that emerged since...
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).
