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Chapter 42: Q.1 (page 1235)

Consider the atoms O16,O18,F18,Ne18,and N20e. Some of the following questions may have more than one answer. Give all answers that apply.

a. Which are isotopes?

b. Which are isobars?

c. Which have the same chemical properties?

d. Which have the same number of neutrons?

Short Answer

Expert verified

(a) O16,O18,N18e,N20e

(b) O18,F18,N18e

(c) O16,O18 have same chemical properties.

N18e,N20ehave same chemical properties.

(d)18Oand20Nehave same neutron number.

Step by step solution

01

Subpart (a) Step 1:

O16,O18,N18e,N20e

02

Subpart (b) part 1:

O18,F18,N18e

03

Subpart (c) Part 1:

O16,O18have same chemical properties.

N18e,N20ehave same chemical properties.

04

Subpart (d) part 1:

N=A-Z

For O16.N=16-8=8

For O18.N=18-8=10

For F18.N=18-9=9

For N18e.N=18-10=8

For N20e.N=20-10=10

So, O16and N18ehave same neutron number.

O18andN20ehave same neutron number.

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