Pre competency in "Writing chemical formulae of ionic compounds" 1. Write chemical formulae of following compounds (first one is solved) : a) Sodium Chloride NaCl b) Calcium Chloride c) Magnesium Sulphate d) Potassium Carbonate e) Aluminum Oxide f) Aluminum Chloride g) Zinc Chloride h) Magnesium Hydroxide i) Calcium Nitrate j) Sodium Carbonate 2. Write charges present on ions in the following compounds (first one is solved) : a) NaCl Na +1, Cl 1 b) Fe 2 O 3 c) CuO d) LiCl e) Pb 2 O 3 f) HgI 2 3. Illustrate exchange of electrons taking place in the formation following ionic compounds with suitable diagrams. (First one is solved) a) NaCl b) MgO, C) MgCl 2 If you are not able to solve these questions, no need to worry! Go ahead with the Interactive Pre competency Tutor Activity Sheet Pack of "Writing chemical formulae of ionic compounds". Watch the videos and complete the activity sheets. We are sure that you'll able to solve these questions and you'll develop a new INSIGHT in Chemistry.
Activity Sheet on Video 1 (01 atomic structures of atoms of some elements.avi) 1. Number of electrons in n th shell, is given by a formula 2n 2. Find electrons in following shells. a) Shell 1 (K shell) 2 1 2 = 2, b) Shell 2 (L shell), c) Shell 3 (M Shell), d) Shell 4 (N shell). 2. Draw atomic structures of a) Beryllium (4 Protons, 4 Electrons), b) Magnesium (12 Protons, 12 Electrons) c) Fluorine (9 Protons, 9 Electrons), d) Neon (10 Protons, 10 Electrons) 3. Write electronic configurations of following atoms (first one is solved) : Name of element Electrons in K Shell Electrons in L Shell Electrons in M Shell a) Nitrogen (7 Electrons) 2 5 b) Aluminum (13 Electrons) c) Boron (5 Electrons) d) Argon (18 Electrons) e) Sulphur (16 Electrons) Activity Sheet on Video 2 (02 stable state of atoms _ octets and duplets.avi) 1. Complete the following table (first one is solved) : Element Name Electrons in last shell Electron Gainer/ Loser Electrons are Gained/Lost a) Chlorine (17 Electrons) 7 Gainer 1 b) Magnesium (12 Electrons) c) Aluminum (13 Electrons) d) Oxygen (8 Electrons) e) Argon (18 Electrons) f) Beryllium (4 Electrons) g) Fluorine (9 Electrons)
Activity Sheet on Video 3 (03 completing octet or duplets _ who are gainers who are losers.avi) 1. Complete the following table (first one is solved) (Es Electrons in the table) : Element Electron Config. Valency Element Electron Config. Valency 1) Hydrogen (1 Es) 1 1 2) Helium (2 Es) 3) Lithium (3 Es) 4) Beryllium (4 Es) 5) Boron (5 Es) 6) Carbon (6 Es) 7) Nitrogen (7 Es) 8) Oxygen (8 Es) 9) Fluorine (9 Es) 10) Neon (10 Es) 11) Sodium (11 Es) 12) Magnesium (12 Es) 13) Aluminum (13 Es) 14) Silicon (14 Es) 15) Phosphorus (15 Es) 16) Sulphur (16 Es) 17) Chorine (17 Es) 18) Argon (18 Es) Activity Sheet on Video 4 (04 writing chemical formulae of ionic compounds _ electronic configurations and valencies.avi) 1. Draw dot cross diagram for the formation following ionic compounds (first one is solved). a) Magnesium Chloride, b) Sodium Oxide, c) Potassium Chloride, d) Aluminum Oxide
Activity Sheet on Video 5 (05 writing chemical formulae of ionic compounds2.avi) 1. Write chemical formulae of following compounds (first one is solved) : a) Sodium Chloride NaCl b) Calcium Chloride c) Magnesium Sulphate d) Potassium Carbonate e) Aluminum Oxide f) Aluminum Chloride g) Zinc Chloride h) Magnesium Hydroxide i) Calcium Nitrate j) Sodium Carbonate 2. Write charges present on ions in the following compounds (first one is solved) : a) NaCl Na +1, Cl 1 b) Fe 2 O 3 c) CuO d) LiCl e) Pb 2 O 3 f) HgI 2 (Remember these questions?!!!) Activity Sheet on Video 6 (06 writing and balancing chemical equations.avi) & Video 7 (07 balancing chemical equations.avi) 1. Write balanced chemical equations for the following reactions (first one is solved). a) Sodium reacts with water to form sodium hydroxide. 2Na (s) + H 2 O (l) 2NaOH (aq) b) Potassium is burnt is air to produce Potassium Oxide. c) Aluminum kept in air develops a protective layer of Aluminum Oxide. d) Water is electrolyzed; it splits into Hydrogen and Oxygen. e) Magnesium reacts with Hydrochloric Acid to produce Magnesium Chloride along with Hydrogen gas. f) Sulphuric Acid reacts with Sodium Hydroxide to produce Sodium Sulphate along with Water.
Activity Sheet on Video 8 (08 formation of covalent compounds) 1. Draw dot cross diagram for the formation of following covalent compounds (first one is solved). a) Formation of O 2 molecule : b) Formation of Cl 2 molecule : c) Formation of N 2 molecule : d) Formation of CO 2 molecule :
Answers : Pre competency in "Writing chemical formulae of ionic compounds" 4. Write chemical formulae of following compounds (first one is solved) : a) Sodium Chloride c) Magnesium Sulphate e) Aluminum Oxide g) Zinc Chloride i) Calcium Nitrate NaCl MgSO 4 Al 2 O 3 ZnCl 2 Ca(NO 3 ) 2 b) Calcium Chloride d) Potassium Carbonate f) Aluminum Chloride h) Magnesium Hydroxide j) Sodium Carbonate CaCl 2 K 2 CO 3 AlCl 3 Mg(OH) 2 Na 2 CO 3 5. Write charges present on ions in the following compounds (first one is solved) : a) NaCl Na +1, Cl 1 c) CuO Cu +2, O 2 e) Pb 2 O 3 Pb +3, Pb +3, O 2, O 2, O 2 b) Fe 2 2O 3 d) LiCl f) HgI I 2 Fe +3, Fe +3, O 2, O 2, O 22 Li +1, Cl 1 Hg +2, I 1, I 1 6. Illustrate exchange of electrons taking place in the formation following ionic compounds with suitable diagrams. ( First one is solved) a) NaCl b) MgO, C) MgCl 2