SCH3U Unit 1 Key Questions1.Complete the blank spaces in the chart for the parts of the atom based on the given information. -2.5 marks NameAtomicnumber (Z)Massnumber(A)Number ofprotonsNumberofelectronsNumberofneutronsNuclidesymbolExplanationIron2858282830Atomicnumberis 26Fe2858Iron’s atomic number is 28. Therefore, the Z value, number of protons,and number of electrons are 28. 58 – 28 = 30 neutrons.Lead822078282125Pb82207If Z = 82, then protons and electrons are also 82.82+125=207, the mass number.Tin50122505072Sn50122Since there are 50 protons, there are 50 electrons and Z is 50. 50+72=122, the mass number.Xenon54135545481Xe54135The nuclide has Z as the lower number (54) and A as the higher number (135). Thus protons and electrons are 54 and neutrons = 135 – 54 = 81Mercury802028080122Hg80202Since there are 80 protons, there are 80 electrons and Z is 80. 202 – 80 = 122, the neutrons. Mercury (Hg) has the atomic number 80.Barium56139565683Ba56139If Z = 56, then protons and electrons are also 56.56 + 83 = 139, the mass number. Barium (Ba) has the atomic number 56.
2.Draw a complete Bohr-Rutherford diagram showing all parts of the atom for N714, S1633, and Ca2040.Bohr-Rutherford diagram for N714.Bohr-Rutherford diagram for S1633.Bohr-Rutherford diagram for Ca2040.
3.The blank periodic table has some numbers inserted into the spaces for certain elements. These numbers identify which element to consider.a.List allof the numbers in the table that refer toi.An alkali metal: 1ii.A halogen: 8iii.An alkaline earth metal: 2iv.A noble gas: 9, 10v.Elements in period 4: 1, 3, 8b.Which numbers refer to non-metals? 4, 6, 7 -1 mark &8,9,104.Place the atoms C, Na, and Si in decreasingorder of atomic radius. Explain your choice of order.
You've reached the end of your free preview.
Want to read all 9 pages?
- Spring '19