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Chapter 42: Q 2 Exercise (page 1236)

How many protons and how many neutrons are in(a)He3,(b)P32,(c)S32, and(d)U238?

Short Answer

Expert verified

Therefore,

a.) 1

b.) 17

c.) 16

d.) 146

Step by step solution

01

Given information

(a)He3,(b)P32,(c)S32, and(d)U238?

02

Explanation (a)

The nucleus is made up of Z protons and A - Z neutrons, as we know.

a.) We have 3He

Atomic number is: 2

Number of protons is: 2

So, number of neutrons for 3He is: 3-2 = 1

03

Explanation (b)

b.) We have 32P

Atomic number is: 15

Number of protons is: 15

So, number of neutrons for 32P is: 32-15 = 17

04

Explanation (c)

c.) We have 32S:

Atomic number is: 16

Number of protons is: 16

So, number of neutrons for 32S is 32- 16 = 16

05

Explanation (d)

d.) We have 228U:

Atomic number is: 92

Number of protons is: 92

So, number of neutrons for 228U is 228-92 = 146

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