The Ones In Purple Are The Metals. The Properties For Metals Are Lustrous (Shiny), Hard, High Density (Are Heavy For Their Size) . The Ones In Blue Are Metalloid. Metalloids Are All Solid At Room Temperture. The Ones In Green Are The Nonmetals. The Properties Fro Nonmetals Are Dull, Not Shiny, Poor Conductor Of Heat.
Protons: a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign. Proton—positive; electron—negative; neutron—no charge. The charge on the proton and electron are exactly the same size but opposite.
Electrons: a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids. Proton—positive; electron—negative; neutron—no charge.
Neutrons: Image result for neutrons
, with no net electric charge and a mass slightly larger than that of a proton. Protons and neutrons, each with mass approximately one atomic mass unit, constitute the nucleus of an atom, and they are collectively referred to as nucleons. Their properties and interactions are described by nuclear physics. Proton—positive; electron—negative; neutron—no charge.
Reactive And Least Reactive
The least reactive family of elements consists of the “noble gases.”This group consists of Helium, Neon, Argon, Krypton, Xenon, and Radon. The reason they are so unreactive is because their inner shells of electrons (a family of electrons that all have very similar energies) are completely filled.
The Periodic Table: Families and Periods. In the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.
Group 1: alkali metals
Group 2: alkaline earth metals
Group 11: coinage metals (not an IUPAC approved name)
Group 15: pnictogens (not an IUPAC approved name)
Group 16: chalcogens
Group 17: halogens
Group 18: noble gases
Atomic Number, Atomic Mass, And Mass Number
In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.
The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons. The atomic number, Z, should not be confused with the mass number, A, which is the number of nucleons, the total number of protons and neutrons in the nucleus of an atom.
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.
Get a periodic table of elements. . Find your element on the periodic table. ...
Locate the element's atomic number. ...
Determine the number of electrons. ...
Look for the atomic mass of the element. ...
Subtract the atomic number from the atomic mass.
Drawing & Labeling (Electron Cloud & Nucleus)
Carbon has four valence electrons and here a valence of four. ... In chemistry, a valence electron is an electron that is associated with an atom, and that can participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Matter cannot be created or destroyed, so there must be the same number of atom of each element on each side of a chemical equation.
The chemical equation for this reaction is written as: The '+' is read as 'reacts with' and the arrow '' means 'produces'.
Count the atoms of each element in the reactants and the products.
Use coefficients; place them in front of the compounds as needed.
Compare and contrast physical and chemical properties, physical and chemical changes. Can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. Chemical changes involve chemical reactions and the creation of new products.
There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
New substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.