<ul><li>Elements are grouped as being either Metals or Non-metals. </li></ul><ul><li>All metals have a definite melting and boiling point. </li></ul>ELEMENTS <ul><li>Elements are pure substances made up of only one type of atom. </li></ul><ul><li>There are about ninety elements that make up all the materials on earth. </li></ul><ul><li>Every element has its own symbol which is a type of code or shorthand for the actual element itself. </li></ul>
ELEMENTS - SYMBOLS Aluminium Bromine Calcium Fluorine Nitrogen Iron Magnesium Hydrogen Gold Oxygen Al Br Ca F Au H Fe Mg N O
<ul><li>An element is made up of only one type of atom. An atom is a tiny particle which can only be seen using a special microscope. </li></ul><ul><li>The smallest amount of an element you can have is one atom. Different atoms make up the different elements, giving them different properties. </li></ul>ELEMENTS
The Reactivity of Elements Elements can combine together in a chemical reaction to form mew substances. Not all elements react easily whilst others are very reactive. Elements can be arranged according to how readily they react. This is called the REACTIVITY SERIES . E.g. Potassium is the most reactive metal whilst Gold is the least reactive metal
THE PERIODIC TABLE Scientists have organised all of the Elements into a chart called the Periodic Table. The elements are arranged in order depending upon their Physical Properties( such as Density) and their Chemical Properties ( such as Reactivity).
THE PERIODIC TABLE PERIODS: The elements with in a period have dissimilar properties from left to right across any period, the physical & chemical properties of elements change from metallic to non metallic along a period. There are seven periods in periodic table.
THE PERIODIC TABLE GROUPS: The vertical columns are called groups Basically there are eights groups (I to VIII) but each group is further divided into “A” & “B” sub groups.
I II III IV V VI VII O 1 2 3 4 5 6 7 Period Group Element Atomic number Most reactive metals Very uncreative gases Most reactive non-metals THE PERIODIC TABLE Li 3 Fr 87 Cs 55 Rb 37 K 19 Na 11 H 1 Ra 88 Ba 56 Sr 38 Ca 20 Mg 12 Be 4 Ac 89 La 57 Y 39 Sc 21 Hf 72 Zr 40 Ti 22 Ta 73 Nb 41 V 23 W 74 Mo 42 Cr 24 Re 75 Tc 43 Mn 25 Os 76 Ru 44 Fe 26 Ir 77 Rh 45 Co 27 Pt 78 Pd 46 Ni 28 Au 79 Ag47 Cu 29 Hg 80 Cd 48 Zn 30 Tl 81 In 49 Ga 31 Al 13 B 5 Pb 82 Sn 50 Ge 32 Si 14 C 6 Bi 83 Sb 51 As 33 P 15 N 7 Po 84 Te 52 Se 34 S 16 O 8 At 85 I 53 Br 35 Cl 17 F 9 Rn 86 Xe 54 Kr 36 Ar 18 Ne 10 He 2
METALS AND NON-METALS Metals Non-Metals Usually hard and shiny. They are usually difficult to melt and are good thermal and electrical conductors. Usually gases or solids that melt easily. Most are good insulators as they are poor thermal and electrical conductors. The solids are often powdery or brittle.
Elements and their symbols Po polonium Eu europium Mo molybdenum Sc scandium Bi bismuth Sm samarium Nb niobium Ca calcium Ku Kutchatovium Pb lead Pm promethium Zr zircon K potassium Lr lawrencium Tl thallium Nd neodymium Y yttrium Ar argon No nobelium Hg mercury Pr praseodymium Sr strontium Cl chlorine Md mendelevium Au gold Ce cerium Rb rubidium S sulphur Fm fermium Pt platinum La lanthanum Kr krypton P phosphorus Es einsteinium Ir iridium Ba barium Br bromine Si silicon Cf californium Os osmium Cs caesium Se selenium Al aluminium Bk berkelium Re rhenium Xe xenon As arsenic Mg magnesium Cm cerium W tungsten I iodine Ge germanium Na sodium Am americium Ta tantalum T tellurium Ga gallium Ne neon Pu plutonium Hf hafnium Sb antimony Zn zinc F fluorine Np neptunium Lu lutetium Sn tin Cu copper O oxygen U uranium Yb ytterbium In indium Ni nickel N nitrogen Pa protactinium Tm thulium Cd cadmium Co cobalt C carbon Th thorium Er erbium Ag silver Fe iron B boron Ac actinium Ho holmium Pd palladium Mn manganese Be beryllium Ra radium Dy dysprosium Rh rhodium Cr chromium Li lithium Fr francium Tb terbium Ru ruthenium V vanadium He helium Rn radon Gd gadolinium Tc technetium Ti titanium H hydrogen S ELEMENT S ELEMENT S ELEMENT S ELEMENT S ELEMENT