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Material assignment Element: An element is a substance made of only one type of atom, and it contains the same amount of protons, neutrons and electrons in every atom, e.g. sodium, chlorine, iron, hydrogen and potassium. Atomic symbol: Na Name: sodium 2,8,1 Relative atomic mass: 23 Atomic number: 11 Compounds: are substances made from 2 or more elements and compounds that are chemically bonded, they carry 2 or more different types of atoms they can bond in different ways like covalent, metallic, ionic, Ionic bonding Sodium atom (Na) Sodium ion it has lost an electron. Sodium reacts through ionic bonding with chlorine. Atomic symbol: Cl Name: chlorine 2,8,7 Relative atomic mass: 35 Atomic number: 17 Chlorine atom (Cl) The atoms are held together by the strong electrostatic attraction between the negative and positive charges in the 2 ions. Na 2,8 ,1 Na+ 2,8 Cl 2,8,7 Cl- 2,8,8 formula: Na+Cl- 1 H 2 He 3 Li 4 Be 5 B 6 C 7 N 8 O 9 F 10 Ne 11 Na 12 Mg 13 Al 14 Si 15 P 16 S 17 Cl 18 Ar 19 K 20 Ca 21 Sc 22 Ti 23 V 24 Cr 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 31 Ga 32 Ge 33 As 34 Se 35 Br 36 Kr 37 Rb 38 Sr 39 Y 40 Zr 41 Nb 42 Mo 43 Tc 44 Ru 45 Rh 46 Pd 47 Ag 48 Cd 49 In 50 Sn 51 Sb 52 Te 53 I 54 Xe 55 Cs 56 Ba 57 *La 72 Hr 73 Ta 74 W 75 Re 76 Os 77 Ir 78 Pt 79 Au 80 Hg 81 Tl 82 Pb 83 Bi 84 Po 85 At 86 Rn 87 Fr 88 Ra 89 +Ac 104 Rf 105 Ha 106 106 107 107 108 108 109 109 110 110 Alkali metals Halogens Non metals Other metals Transition metals Alkali earth metals Inert metals covalent bonding: sharing 2...

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