The mass number is the number of protons plus the number of neutrons of that element. Every element is made up of its own type of atom. Strontium is a soft, silver-yellow, alkaline-earth metal. In chemistry these properties are called Physical properties and Chemical properties. The boron mineral ulexite exhibits natural fiberoptic properties. The atomic number of an element is equal to the number of protons that element contains. An element is a substance that cannot be broken down into any other substance. Property-attribute synchronization. They also combine in different ways. Infoplease is part of the FEN Learning family of educational and reference sites for parents, teachers and students. The atomic number tells you how many protons an atom has. Learn more about the characteristics, distribution, and uses of silicon in this article. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed. While some of these properties are due chiefly to the electronic structure of the element, others are more closely related to properties of the nucleus, e.g., mass number. The chemical properties of an element are due to the distribution of electrons around the atom's nucleus, particularly the outer, or valence, electrons; it is these electrons that are involved in chemical reactions. These properties include color, smell, freezing point, boiling point, melting point, opacity, viscosity, and density. The atomic mass is the mass of an atom presented as atomic mass units. The chemical and physical properties of the chemical elements have similarities that recur, showing up in related elements in a group (column) of the periodic table. Examples of elements include iron, copper, hydrogen and oxygen. Electrons exist at energy levels that form shells around the nucleus. Group 1 Elements: The Alkali MetalsThe elements in Group 1 are: These elements are known as alkali metals. Such elements occur a definite number of places apart—such as every 8th, or every 18th, atomic number. Value is available as input.value, textarea.value, select.value etc, or input.checked for checkboxes and radio buttons. This is because they only have electrons in their first shell. A chemical element is a pure substance that consists of one type of atom. These properties include color, density, melting … A detailed figure of the electron shells for each element can be found here. Properties are attributes, qualities or characteristics of something. Uses and Occurrences: How the element is (or was) used or where it is found. (b) This is because halogens are reactive non-metals. Looking at the periodic table again (Figure 1), you will notice that there are seven rows. Some form specific types of bonds, whereas others do not. Helium has two electrons; therefore, it can completely fill the lowest shell with its two electrons. Official Symbols and Names for the Elements. Strontium. malleability. It covers ionization energy, atomic radius, electronegativity, electrical conductivity, melting point … These are the basics to start working with forms. It is also the lightest element. the ability of a solid element to be hammered without shattering. Infoplease is a reference and learning site, combining the contents of an encyclopedia, a dictionary, an atlas and several almanacs loaded with facts. The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions. Next to fluorine, oxygen has the highest electronegativity value amongst the elements. These numbers provide information about the elements and how they will react when combined. chemical bondAny of several attractive forces that serve to bind atoms together to form molecules. they exist naturally in various mineral salts in […] For