本题目来源于试卷: Classification of Matter A.1 Periodic Table Elements Classification，类别为 IB化学
[问答题]
1.The valence electrons in I2IX n8r0-j bzo e3fu 7q-ttag yg8:(nkpu4h jzwq9yp4g4p)re farther from their nuclei than the valence electro:yq4p g9 wpyn4 8g(pugj)z4khns in $Cl_2$. Explain how the size of the atoms in a covalent bond can affect the relative attraction to electrons and hence the bond's polarity.
2.Calculate the electronegativity differences and then deduce the type of bonding in the following compounds $Cl_2$,HCl,and NaClClX,HCl,and NaCl (Refer to Table 8 from the data booklet) .
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