- Valencies of first 30 elements :
\begin{array}{| c | c | c |}\cline{1-3} \bf Atomic\:No. & \bf Elements & \bf Valency \\ \cline{1-3} 1 &\sf Hydrogen & 1 \\ \cline{1-3} 2 &\sf Helium & 0 \\ \cline{1-3} 3 &\sf Lithium & 1 \\ \cline{1-3} 4 &\sf Berrylium & 2 \\ \cline{1-3} 5 &\sf Boron & 3 \\ \cline{1-3} 6 &\sf Carbon & 4 \\ \cline{1-3} 7 &\sf Nitrogen & 3 \\ \cline{1-3} 8 &\sf Oxygen & 2 \\ \cline{1-3} 9 &\sf Flourine & 1 \\ \cline{1-3} 10 &\sf Neon & 0 \\ \cline{1-3} 11 &\sf Sodium & 1 \\ \cline{1-3} 12 &\sf Magnesium & 2 \\ \cline{1-3} 13 &\sf Aluminium & 3 \\ \cline{1-3} 14 &\sf Silicon & 4 \\ \cline{1-3} 15 &\sf Phosphorus & 3 \\ \cline{1-3} 16 &\sf Sulphur & 2 \\ \cline{1-3} 17 &\sf Chlorine & 1 \\ \cline{1-3} 18 &\sf Argon & 0 \\ \cline{1-3} 19 &\sf Potassium & 1 \\ \cline{1-3} 20 &\sf Calcium & 2 \\ \cline{1-3} 21 &\sf Scandium & 3 \\ \cline{1-3} 22 &\sf Titanium & 4 \\ \cline{1-3} 23 &\sf Vanadium & 5,4 \\ \cline{1-3} 24 &\sf Chromium & 2 \\ \cline{1-3} 25 &\sf Manganese & 7,4,2 \\ \cline{1-3} 26 &\sf Iron & 2,3 \\ \cline{1-3} 27 &\sf Nickel & 3,2 \\ \cline{1-3} 28 &\sf Cobalt & 2 \\ \cline{1-3} 29 &\sf Copper & 2,1 \\ \cline{1-3} 30 &\sf Zinc & 2 \\ \cline{1-3}\end{array}
- MP & BP of Ionic compounds :
\boxed{\begin{array}{|c|c|c|c|} \cline {1-4}\Large\sf {Ionic\:Compounds} & \sf \Large {Chemical\:Formula} & \Large \sf{Melting\:point_{(k)}} & \Large\sf {Boiling\:point_{(k)}} \\ &&& \\ \cline {1-4} \sf Sodium\:Chloride & \sf NaCl & 1074 & 1686 \\ &&& \\ \cline {1-4} \sf Lithium\:Chloride & \sf \sf LiCl & 887 & 1600 \\ &&& \\ \cline {1-4} \sf Calcium\:Chloride & \sf CaCl_2 & 1045 & 1900 \\ &&& \\ \cline {1-4} \sf Calcium\:Oxide & \sf CaO & 2850 & 3120 \\ &&& \\ \cline {1-4} \sf Magnesium\:Chloride & \sf MgCl_2 & 981 & 1685 \\ &&& \\ \cline {1-4} \end{array}}
- Electron configuration table :
\boxed {\begin{array}{|c|c|c|c|cccc|}\cline {1-8}\sf Element & \sf Symbol & \sf Valency & \sf{Atomic\:Number} & & \sf{Electron} & \sf Configuration & \\ \cline {5-8} &&&&\bf K&\bf L &\bf M&\bf N \\ \cline {1-8}\rm Hydrogen &\sf H & 1 & 1 & 1 &&& \\ \cline {1-8}\rm Helium &\sf He & 0 & 2 & 2 &&& \\ \cline {1-8}\rm Lithium &\sf Li & 1& 3 &2 &1 && \\ \cline {1-8}\rm Beryllium &\sf Be & 2 & 4 & 2 & 2 && \\ \cline {1-8}\rm Boron &\sf B & 3 & 5 & 2 & 3 && \\ \cline {1-8}\rm Carbon & \sf C & 4 & 6 & 2 & 4 && \\ \cline {1-8}\rm Nitrogen &\sf N & 3 & 7 & 2 & 5 && \\ \cline {1-8}\rm Oxygen &\sf O & 2 & 8 & 2 & 6 && \\ \cline {1-8}\rm Fluorine &\sf F & 1 & 9 & 2 & 7 && \\ \cline {1-8}\rm Neon & \sf Ne & 0 & 10 & 2 & 8 && \\ \cline {1-8}\rm Sodium &\sf Na & 1 & 11 & 2 & 8 & 1 &\\ \cline {1-8}\rm Magnesium &\sf Mg & 2 & 12 & 2 & 8 & 2 & \\ \cline {1-8}\rm Aluminium &\sf Al & 3 & 13 & 2 & 8 & 3 & \\ \cline{1-8}\rm Silicon &\sf Si & 4 & 14 & 2 & 8 & 4 & \\ \cline {1-8}\rm Phosphorus &\sf P & 3 & 15 & 2 & 8 & 7 & \\ \cline {1-8}\rm Sulphur &\sf S & 2 & 16 & 2 & 8 & 8 & \\ \cline{1-8}\rm Chlorine &\sf Cl & 1 & 17 & 2 & 8 & 8 &1 \\ \cline {1-8}\rm Argon &\sf Ar & 0 & 18 & 2 & 8 & 8 & 2 \\ \cline {1-8}\rm Potassium &\sf K & 1 & 19 & 2 & 8 & 8 &3 \\ \cline {1-8}\rm Calcium &\sf Ca & 2 & 20 & 2 & 8 & 8 & 4 \\ \cline{1-8} \end {array}}
- Hybridisation table :
\begin{array}{|c|c|c|c|}\cline{1-4}\bf Hybridisation&\bf Shape&\bf Bond\ angle&\bf Examples\\\cline{1-4}\tt sp&\sf Linear&180^{\circ}&\sf BeF_2, C_2H_2, BeCl_2\\\cline{1-4}\tt sp^2&\sf Triangular\ planar&120^{\circ}&\sf BF_3, C_2H_4, SO_3\\\cline{1-4}\tt sp^3&\sf Tetrahedral&109.5^{\circ}&\sf CH_4, SiF_4, CCl_4\\\cline{1-4}\tt dsp^2&\sf Square\ planar&90^{\circ}&\sf [PtCl_4]^{-2}, [Ni(CN)_4]^{-2}\\\cline{1-4}\tt sp^3d/dsp^3&\sf Trigonal\ bipyramidal&120^{\circ}\ \sf{and}\ 90^{\circ}&\sf PCl_5, [Fe(CO)_5]\\\cline{1-4}\tt sp^3d^2/d^2sp^3&\sf Octahedral&90^{\circ}&\sf SF_6, UF_6, [CrF_6]^{-3}\\\cline{1-4}\tt sp^3d^3/d^3sp^3&\sf Pentagonal\ bipyramidal&72^{\circ}\ \sf{and}\ 90^{\circ}&\sf IF_7\\\cline{1-4}\end{array}
- Reactivity series :
\setlength{\unitlength}{0.8 cm}\begin{picture}(20,15)\thicklines\put(5,9.5){\large {\boxed{ \sf{Reactivity \: series}}}}\put(0.8,8){\large\sf K \qquad\qquad\qquad Potassium\qquad\qquad\qquad \: maximum}\put(0.8,7.2){\large\sf Na \qquad\qquad\qquad Sodium\qquad\qquad\qquad\quad \: reactivity}\put(0.8,6.2){\large\sf Ca\qquad\qquad\qquad \: Calcium}\put(0.8,5.2){\large\sf Mg\qquad\qquad\quad \: Magnesium}\put(0.8,4.2){\large\sf Al\qquad\qquad\qquad \: Aluminium\qquad\qquad\qquad \: decreasing}\put(0.8,3.2){\large\sf Zn\qquad\qquad\quad\qquad \: Zinc\qquad\qquad\qquad\qquad \:reactivity}\put(0.8,2.2){\large\sf Fe\qquad\qquad\quad\qquad Ferrous}\put(0.8,1.2){\large\sf Pb\qquad\qquad\qquad \: \:\: Lead}\put(0.8,0.2){\large\sf H\qquad\qquad\qquad \: \:Hydrogen}\put(0.8, - 0.6){\large\sf Cu\qquad\qquad\qquad \: Copper}\put(0.8, - 1.5){\large\sf Hg\qquad\qquad\qquad \: Mercury}\put(0.8, - 2.5){\large\sf Ag\qquad\qquad\qquad \: \:Silver}\put(0.8, - 3.5){\large\sf Au\qquad\qquad\qquad \: \: Gold\qquad\qquad\qquad\quad \: \: minimum reactivity}\put(9.3,8.2){\vector(0, - 2){12}}\end{picture}
