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11 March, 07:54

Atomic number of Element A is 11 and that of element B is 9. Write the formula of the compound formed when A combines with B.

b) Find the group of these elements.

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  1. 11 March, 08:14
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    a. AB

    b. 11=group 1

    9=group 7

    Explanation:

    A=11

    B=9

    When they combine, that's

    A+B=AB

    According to the chemistry, element with atomic number 11 is sodium and element with atomic number of 9 is fluorine

    So when they come it will give NaF

    B. Na=11

    =2,8,1

    It belongs to group 1

    F=9

    =2,7

    It belongs to group 7

    When they combine by form ionic bond
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