Metals, Nonmetals, and Metalloids on the Periodic Table.
Metals on the Periodic Table are grouped together in the middle to the left hand side of the periodic table. Metals consist of the alkali metals, alkaline earths, transition metals, lanthanides and actinides. Metals have typical physical properties like, lustrous, hard, high density, high tensile strength, High melting and boiling points, good conductors of heat and electricity. Nonmetals on the Periodic Table are elements in the groups 14-16 of the periodic table. Non-metals are not able to conduct electricity or heat very well. Their properties are dull, not shiny, a poor conductor of heat, a poor conductor of electricity, high ionization energies, high electronegativity, not malleable or ductile, usually brittlelower density, lower melting point and boiling points, gains electrons in reactions. And finally Metalliods are found along the stair-step line that distinguishes metals from non-metals. This line is drawn from between Boron and Aluminum to the border between Polonium and Astatine. Their properties are all solid at room temperature. Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semi-conductors. Silicon for example appears lustrous, but is not malleable or ductile. It is a much poorer conductor of heat and electricity than the metals. They can form alloys with other metals.
Protons are a stable subatomic particle occurring in all atomic nuclei. They have a positive electric charge. Neutrons are a ubatomic particle of about the same mass as a proton. But, they have no charge at all. And finally, electrons have are subatomic particle found in all atoms and acting as the primary carrier of electricity in solids. And they have a negative charge.
Dmitri Mendeleev is the father of the Periodic Table.
Most reactive and least reactive of elements on the Periodic Table.
The most reactive of elements of the Periodic Table is Oxygen, Francium, Florine, and Sodium. The least reactive on the Periodic Table is Neon, Xenon, and Helium.
Periods On The Periodic Table
Vertical and Horizontal periods of the Periodic Table.
Groups Of The Periodic Table
These are the group names of the Periodic Table... Group 1 is alkali metals, group 2 are alkaline earth metals, group 11 are coinage metals, group 15 is pnictogens, group 16 are chalcogens, group 17 is halogens, and group 18 is noble gases.
Atomic Mass, Atomic Number, and Mass Number on an Element
The atomic number tells the chlorine atom has 17 protons. An Atomic mass tells an element's or isotope's atomic number and how many protons are in its atom. And the Mass Number tells uniquely identifies a chemical element.
Atomic Number Of An Element
Atomic number is the number of protons
Atomic Mass Of An Element
Atomic Mass is the total mass of protons, neutrons, and electrons in a given element.
These are the steps for how to find the number of electrons. First you get a periodic table of elements. Then find your element on the periodic table, locate the element's atomic number. Next determine the number of electrons. And look for the atomic mass of the element. And finally, subtract the atomic number from the atomic mass. And you have your number of electrons.
Electron Cloud and Nucleus.
An electron cloud is an informal term in physics. Its used to describe where electrons are when they go around the nucleus of an atom.
A valence electron is an electron that is associated with an atom, it can participate in the formation of a chemical bond.
Pattern for drawing an Atom.
- C = 1
- C = 1
- H = 4
- H = 4
- O = 4
- O = 2 (2) --> 4
The chemical formulas on the left represent the starting substances, called reactants. The substances produced by the reaction are shown on the right, and are called products.
The arrow in an Chemical Equation yields the product.
A balanced chemical equation
Firework is a chemical properties
Ice cubes is a Physical properties
Physical properties are used to observe and describe matter. Chemical changes involve chemical reactions and the creation of new products.
Physical and Chemical Changes
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.
The signs of chemical changes are change in temperature. Also change in color, formation of bubbles. Formation of a solid, and production of a odor.