Science Application: An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of -1. Remember number of electrons is equal to number of protons, while answering these questions:
a. What is the charge on an atom
b. What will be the charge on an atom if it loses an electron
c. What will be the charge on an atom if it gains an electron

Solution:

To answer the given questions let us examine the problem deeply using the properties of integers.

1. Total charge on an atom = +1-1= 0
2. When an atom loses an electron, in this case, the charge on the atom is +1.
3. If an atom gains an electron then the charge on an atom = -1.

✦ Try This: Fill in the blank: a. -7 + (-13) = ____. b. 17 × __ = -323

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

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

NCERT Exemplar Class 7 Maths Chapter 1 Exercise Problem 110

Science Application: An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge of -1. Remember number of electrons is equal to number of protons, while answering these questions: a. What is the charge on an atom? b. What will be the charge on an atom if it loses an electron? c. What will be the charge on an atom if it gains an electron

Summary:

After applying the integer rules we examined that the following parts can be answered in the respective manner. a) 0, b) +1, c) -1

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