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Chapter 2: Q43P (page 40)

Write theXZAnotation for each atomic depiction

(a)(b) (c)

Short Answer

Expert verified

In an element A represents the mass number and while Z represents atomic number of an element.

aA1838rbM2555ncA47109g

Step by step solution

01

Step 1  Solution for part (a)

Given,

Number of protons = 18

Number of electrons = 18

Number of neutrons = 20

We know,

Atomic number = number of protons = 18

Atomic mass = number of protons + number of neutrons

Atomic mass = 18 + 20 = 38

From the above calculation,A1838r

02

Step 2  Solution for part (b)

Given,

Number of protons = 25

Number of electrons = 25

Number of neutrons = 30

We know,

Atomic number = number of protons = 25

Atomic mass = number of protons + number of neutrons

Atomic mass = 25 + 30 = 55

From the above calculation,M2555n

03

Step 3  Solution for part (b)

Given,

Number of protons = 47

Number of electrons = 47

Number of neutrons = 62

We know,

Atomic number = number of protons =

Atomic mass = number of protons + number of neutrons

Atomic mass = 47 + 62 = 109

From the above calculation,A47109g

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