The major defining feature of metals is that electrons flow relatively freely between atoms in any object composed of two or more metal atoms, whereas electrons around nonmetals are more tightly bound to their respective... More »

Metalloids do not conduct heat and electricity as well as metals, but otherwise, they display some of the properties of metals and some properties of nonmetals. The majority of all elements are metals, and metalloids are... More »

Ionic compounds form when electrons transfer from one atom to another. Covalent compounds form when atoms share electrons, resulting in no net loss or gain of electrons as seen in ionic compounds. More »

The bonds that hold the atoms in metals together are often described as being built upon metal ions that are floating in a sea of electrons. This is because the electrons in the outer shells, or valence shells, of metals... More »

In chemistry, ionic bonds and covalent bonds are both methods atoms use to combine into larger molecules by swapping or sharing outer electrons. An atom's energy level is determined by the number and configuration of ele... More »

Alterations to the electron-based ionic or covalent bonds between ions or atoms happen during a chemical change. Such changes result in one or more new substances with different physical and chemical properties. This typ... More »

Chemical reactions occur when two molecules collide with each other in a certain orientation and amount of force, which causes a chemical change due to the breaking and forming of the bonds between the atoms. Bonds are b... More »