part b.\n1.draw the bohr - rutherford model of atomic structure for element beryllium. (2marks)\n2. draw the…
part b.\n1.draw the bohr - rutherford model of atomic structure for element beryllium. (2marks)\n2. draw the lewis diagram for calcium ion. (3marks)\napplications /10\npart c. using bohr - rutherford model or lewis diagram of atomic structure, show the formation of the bond(s) between mg and o. what is the formula for the compound? what is the name of the compound?\npart d. complete the charts below.\nthinking /10\nchemical name chemical formula\n1.copper(ii) nitride\n2.aluminum acetate\n3.sodium chlorite\n4.nickel(ii) oxide\n5.ammonium hydroxide\nchemical formula chemical name\n1. be(no₃)₂\n2.pbo\n3.fes\n4.hgcl\n5. srso₃
Answer
Answer:
(1) For Beryllium (Be, atomic number = 4) in Bohr - Rutherford model: Draw a nucleus with 4 protons and 5 neutrons (approximate number of neutrons for most common isotope). Then draw 2 electrons in the first shell and 2 electrons in the second shell. (2) For Calcium ion (Ca²⁺, atomic number = 20): Calcium atom has 20 electrons. Ca²⁺ has 18 electrons. In Lewis diagram, draw the symbol Ca²⁺. (3) For Mg and O: Mg (2,8,2) loses 2 electrons to form Mg²⁺ and O (2,6) gains 2 electrons to form O²⁻. They form an ionic bond. Formula: MgO. Name: Magnesium oxide. (4)
| Chemical name | Chemical formula |
|---|---|
| 1.Copper(II) nitride | Cu₃N₂ |
| 2.Aluminum acetate | Al(CH₃COO)₃ |
| 3.Sodium chlorite | NaClO₂ |
| 4.Nickel(II) oxide | NiO |
| 5.Ammonium hydroxide | NH₄OH |
| Chemical formula | Chemical name |
| -- | -- |
| 1. Be(NO₃)₂ | Beryllium nitrate |
| 2.PbO | Lead(II) oxide |
| 3.FeS | Iron(II) sulfide |
| 4.HgCl | Mercury(I) chloride |
| 5. SrSO₃ | Strontium sulfite |