periodic table metal definition alloy definition chemistry

#Periodic table metal definition alloy definition chemistry code
#Periodic table metal definition alloy definition chemistry series

Becquerel - (Bq) is a unit of radioactivity, with 37 billion Bq equal to 1 curie. Basic - having the characteristics of a base, with a pH above 7. B Base - the substance which accepts H+ ions and produces hydroxide ions OH- when added to wateris called base. Avogadro's number - N A = 6.022 * 10 23 items/mole. Avogadro's law - is a gas law which states that, under the same condition of temperature and pressure, equal volumes of all gases contain the same number of molecules. Aufbau principle - a description of the building up of the elements in which he orbitals of lower energy are filled in first with the electrons and only then the orbitals of high energy are filled. For example, 'He' is the symbol for helium.

#Periodic table metal definition alloy definition chemistry code

atomic symol - is a 1-, 2-, or 3-letter internationally agreed code for a chemical element, usually derived from the name of the element, often in Latin. atomic radius - is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the surrounding cloud of electrons. Atomic number - the number of protons in an atom of an element. Atomic mass - of an element is the sum of the masses of its isotopes each multiplied by its natural abundance. Atom - the basic unit of a chemical element. Arrhenius base increases the concentration of OH - ions in an aqueous solution. Arrhenius base - is a substance that dissociates in water to form hydroxide (OH i) ions. Arrhenius acid increases the concentration of H + ions in an aqueous solution. Arrhenius acid - is a substance that dissociates in water to form hydrogen (H +) ions.

A cathode is a negatively charged electrode that attracts the positive ions (cations) in a circuit or chemical reaction. Anode - is an electrode through which electric current flows into a polarized electrical device. amu - atomic mass unit (amu) is an unit of measurement that is used to measure the mass of atoms and roughly equivalent to 1.67x10 -27kg. Amalgam - a liquid alloy of mercury with another metal. Alpha Decay - or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle. Alloy - an alloy is a mixture of two or more elements, of which at least one is metal. Allotropes - are different structural modifications of the same element. Alkynes - are hydrocarbons containing at least one triple bond. Alkenes - are unsaturated hydrocarbons containing at least one carbon-carbon double bond C=C between two adjacent cabon atoms. Alkanes - are saturated hydrocarbons in which all the carbon and hydrogen atoms are only linked by single bonds. Alkaline earth metals - the elements found in Group 2 of the periodic table.

Alkali metals - the elements found in Group 1 of the periodic table. Alchemy - speculative philosophy practiced in the Middle Ages and the Renaissance that involved the process of transmutation of the base metals into gold. Adsorption - is accumulation of a chemical on the surface of a solid (adsorbent) forming a film of adsorbate. Activation Energy - is minimum energy needed to start a reaction.

#Periodic table metal definition alloy definition chemistry series

Actinide - the actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. Acid dissociation constant K a - is Quantitative measure of the strength of an acid in solution.

Acid-base reaction - is a chemical reaction in which an electron pair is donated by a base to an acceptor acid.

Metal ions are surrounded by delocalized electrons.A Acid - a compound usually having a sour taste and capable of neutralizing alkalis and bases.

Bonding in metals is often described through the 'electron sea model'.