Question

1.There were 480 potatoes in a sack. The chef used 2 upon 9 of them to make chips. How many potatoes did he use?​

Answer 1

Answer:

1)

$\begin{array}{|c|c|c|c|}\bf Hybridisation&\bf Shape&\bf Bond\ angle&\bf Examples\\\tt sp&\sf Linear&180^{\circ}&\sf BeF_2, C_2H_2, BeCl_2\\\tt sp^2&\sf Triangular\ planar&120^{\circ}&\sf BF_3, C_2H_4, SO_3\\\tt sp^3&\sf Tetrahedral&109.5^{\circ}&\sf CH_4, SiF_4, CCl_4\\\tt dsp^2&\sf Square\ planar&90^{\circ}&\sf [PtCl_4]^{-2}, [Ni(CN)_4]^{-2}\\\tt sp^3d/dsp^3&\sf Trigonal\ bipyramidal&120^{\circ}\ \sf{and}\ 90^{\circ}&\sf PCl_5, [Fe(CO)_5]\\\tt sp^3d^2/d^2sp^3&\sf Octahedral&90^{\circ}&\sf SF_6, UF_6, [CrF_6]^{-3}\\\tt sp^3d^3/d^3sp^3&\sf Pentagonal\ bipyramidal&72^{\circ}\ \sf{and}\ 90^{\circ}&\sf IF_7\\\end{array}$

2)

$boxed {\begin{array}{|c|c|c|c|cccc|}\sf Element & \sf Symbol & \sf Valency & \sf{Atomic\:Number} & & \sf{Electron} & \sf Configuration & \\ &&&&\bf K&\bf L &\bf M&\bf N \\\rm Hydrogen &\sf H & 1 & 1 & 1 &&& \\\rm Helium &\sf He & 0 & 2 & 2 &&& \\\rm Lithium &\sf Li & 1& 3 &2 &1 && \\\rm Beryllium &\sf Be & 2 & 4 & 2 & 2 && \\\rm Boron &\sf B & 3 & 5 & 2 & 3 && \\\rm Carbon & \sf C & 4 & 6 & 2 & 4 && \\\rm Nitrogen &\sf N & 3 & 7 & 2 & 5 && \\\rm Oxygen &\sf O & 2 & 8 & 2 & 6 && \\\rm Fluorine &\sf F & 1 & 9 & 2 & 7 && \\\rm Neon & \sf Ne & 0 & 10 & 2 & 8 && \\\rm Sodium &\sf Na & 1 & 11 & 2 & 8 & 1 &\\\rm Magnesium &\sf Mg & 2 & 12 & 2 & 8 & 2 & \\\rm Aluminium &\sf Al & 3 & 13 & 2 & 8 & 3 & \\\rm Silicon &\sf Si & 4 & 14 & 2 & 8 & 4 & \\\rm Phosphorus &\sf P & 3 & 15 & 2 & 8 & 7 & \\\rm Sulphur &\sf S & 2 & 16 & 2 & 8 & 8 & \\\rm Chlorine &\sf Cl & 1 & 17 & 2 & 8 & 8 &1 \\\rm Argon &\sf Ar & 0 & 18 & 2 & 8 & 8 & 2 \\\rm Potassium &\sf K & 1 & 19 & 2 & 8 & 8 &3 \\\rm Calcium &\sf Ca & 2 & 20 & 2 & 8 & 8 & 4 \\\end {array}}$

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Answer 2

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