An atom changes to a charged particle called ion if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge on protons. Now, write the missing information in the table given belo

Solution:

To answer the missing information in the above question let us examine the problem deeply using the properties of integers.

As per scientific logic we have,

Hydroxide ion charge = Proton charge + Electron charge

Hydroxide ion charge = -1

Proton charge = +9

Electron charge = -1 - 9 = -10

Similarly, Sodium ion charge = Proton charge + Electron charge

Sodium ion charge = +1

Proton charge = +11

Electron charge = 1 - 11 = -10

For aluminium ion charge = Proton charge + Electron charge

Proton charge = +13

Electron charge = -10

Aluminium ion charge = 13 - 10 = +3

For oxide ion charge = Proton charge + Electron charge = 8 - 10 = -2

✦ Try This: Fill in the blank: a. -17 + (-13) = ____. b. -323 ÷ __ = -19

Now to fill the given blank we can apply integer rules and the rule of division

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 1

NCERT Exemplar Class 7 Maths Chapter 1 Exercise Problem 111

An atom changes to a charged particle called ion if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge on protons

Summary:

After applying the integer rules we examined that the following missing parts can be answered in the respective manner. In hydroxide ions, the electron charge is -10. In Sodium ions, the electron charge is -10. In aluminium ion charge is +3, and in oxide ion charge is -2

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