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Download Science term 3 week 2
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Science homework week 2 term 3 Ed Howard 1) P= Protons, Are positive, are in the nucleus, is the smallest, N= Neutrons are neutral,Are the heaviest e= Electron, is negative & spins around the nucleus, 2) The electrons ( negative) spins around the nucleus where the protons & neutrons are. 3. The number of protons and electrons have to be the same number to make sure the atom is not unbalanced. 4. a) atomic number is the amount of protons found in the nucleus of the atom b) Mass number is the number of mass the atom has c) The nucleus is the centre of an atom 5. 26 Fe, 28 Ni, 29 Cu, 197Au 56 59 64 79 = 0.4642857143 8. Dalton first suggested the existence of the atom, however it took almost two millennia before the atom was placed on a solid foothold as a chemical object by john Dalton (1766-1844). 9. Atom is smallest unit which consisit of proton, neutron and surrounded by electron. No of proton is always equal to no of electron and thus atom is no charge. For examples H, C, O, N are atoms. Molecule is combination of atoms with bond. Molecule is created by bonded atoms when electrons fill up the outer orbit of each atom. For example H2, CO2, N2 19. a) SO2= Sulfur Dioxide b) H2S= Hydrogen Sulfide c) C12H22011= Table sugar d) H2SO4= Sulfuric Acid e) CH3COOH= Acetic Acid 20.
