Difference between monovalent atom and divalentv atoms

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Solution

Monovalent atoms are those atoms which show a valency of 1, while divalent atoms are those which show a valency of 2. For example, sodium (Na), chlorine, potassium etc are monovalent while magnesium, oxygen, calcium are divalent.

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\begin{matrix} (a)Tetravalency & (i) A t o m s o f t h e s a m e e l e m e n t l i n k s t o f o r m l o n g c h a i n c o m p o u n d s . (b)Saturated hydrocarbons & (i i) A l k e n e s a n d A l k y n e s (c)Catenation & (i i i) A l k a n e s (d)Unsaturated hydrocarbons & (i v) A b i l i t y o f c a r b o n t o b o n d w i t h c a r b o n o r 4 o t h e r m o n o v a l e n t a t o m s o r t w o o t h e r d i v a l e n t a t o m s \end{matrix}

B a T i (S i_{3} O_{9})

Z n C a_{2} S i_{2} O_{7}

X \div Y

I_{1}

I_{2}

700

1200 k J m o l^{- 1}

1000 k J m o l^{- 1}

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