Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. These properties are largely determined by the interatomic bonding strengths and molecular structures of the nonmetals involved, both of which are subject to variation as the number of valence electrons in each nonmetal varies. The nonmetals are brittle, not malleable or ductile, poor conductors of both heat and electricity, and tend to gain electrons in chemical reactions. Physical Properties of Nonmetals. Only bromine exists as a liquid at room temperature. Ionic Bonds. Many nonmetals can gain metallic properties under very high pressures. Non-Malleable and Ductile: Non-metals are very brittle, and cannot be rolled into wires or pounded into sheets. Characteristics properties of non-metals are high ionization energies and high electronegativity. The following are the physical properties of metal : The physical properties make them useful for many purposes. Non-Metal dopants are carbon, nitrogen, fluorine, sulphur and iodine. Carbon is the single most important element to the existence of life on Earth. The nonmetals in the periodic table. Properties of Non metals. Nonmetals can form different types of bonds depending on their partner atoms. Selenium gets its name from the Greek word "selene" which means "Moon." Properties of metals can be explained in terms of metallic structure and bonding. Among the non-metals, the anionic dopants have a strong influence on the VB. The nonmetal element group is a subset of these elements. Properties of nonmetals include a relatively low boiling point, which explains why many of them are gases at room temperature. Different chemical models have different features and limitations. Because of these properties non-metals usually gain electrons when reacting with other compounds, forming covalent bonds. Properties of Nonmetals. Some nonmetals are liquids. These elements have similar chemical properties that differ from the elements considered metals. Nonmetals show more variability in their properties than do metals. Metals and non-metals have different properties. Copper is used in making electric wires, gold is used to make jewellery, stainless steel is used to make pots, pans, etc More on the Elements and the Periodic Table Elements Periodic Table. These elements are shown in the following figure. Metalloids. Nonmetals have properties opposite those of the metals. As their name suggests, nonmetals generally have properties that are very different from the properties of metals. The nonmetal element group consists of hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur and selenium. Nonmetals include the nonmetal group, the halogens, and the noble gases. 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