The identity of an element is determined by the total number of protons present in the nucleus of an atom contained in that particular element. An atom is the smallest fundamental unit of an element.Know More
In chemistry, an element is defined as a constituent of matter containing the same atomic type with an identical number of protons. Protons, along with electrons and neutrons, are the main subatomic particles comprising an atom. Protons carry a positive charge, electrons carry a negative charge and neutrons are electrically neutral. The protons and neutrons are located inside an atom's nucleus, while the electrons freely revolve around the nucleus. The mass number, represented by "A," is the sum of the number of protons and neutrons in the nucleus.
An atom's total number of protons, commonly denoted by the capital letter "Z," is the primary basis for determining a chemical element's identity. An atom with one proton is identified as hydrogen, six protons is carbon, 29 protons is copper, 79 protons is gold and 82 protons is lead.
Two atoms of the same element can have the same atomic number, but vary in mass number. All carbon atoms have six protons, but some have 6 neutrons, 7 neutrons or 8 neutrons, and these atoms of the same element are called isotopes.Learn more about Chemistry
Oxygen is an element, not a compound, and can be found on the periodic table with the atomic number eight. Oxygen is primarily found in two common forms, oxygen gas and in air. Oxygen gas molecules are made of two oxygen atoms covalently bonded together, but it is still considered an element; air is a mixture of mainly oxygen and nitrogen, which makes it a compound.Full Answer >
About.com cites that the element silver got its name from the Anglo-Saxon word seolfor or siolfur, both of which mean "silver." The Latin term argentum also means silver and is the origin for its chemical symbol, Ag. Argentum originated from the Sanskrit word argunas, which means shining.Full Answer >
Water is a compound made of two atoms of hydrogen and one atom of oxygen. The hydrogen atoms are bonded to the oxygen atom by the sharing of electrons, called a covalent bond.Full Answer >
Common table salt, without any of the extra ingredients that may be added to the retail food product, is a compound comprised of the metallic element sodium and the non-metallic element chlorine. The chemical name for pure table salt is sodium chloride, and it is represented by the chemical formula NaCl, which indicates that each molecule consists of one sodium atom bonded to a chlorine atom. Because the bond holding the two atoms together is an ionic bond, sodium chloride belongs to the class of chemical compounds called ionic salts or ionic compounds.Full Answer >