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Chapter 2: Q2.3CYL (page 80)

An ion of platinum has a mass number of 195 and contains 74 electrons. How many protons and neutrons does it contain and what is it’s charge ?

Short Answer

Expert verified

The number of protons present in the platinum ion is 78.

The number of neutrons present in the platinum ion is (195-78)=117.

The charge present on the ion is (78-74)= +4.

Step by step solution

01

Find the atomic number of Pt

The atomic number of Pt is 78. As atomic number = number of protons, therefore, number of protons = 78

02

Calculate the number of neutrons

We know that mass number = number of protons + number of neutrons

195 = 78 + number of neutrons

Number of neutrons= 195-78= 117

03

Calculate charge

In a neutral atom, the number of electrons = the number of protons

However, since it is an ion, the charge will be 78-74= +4

Therefore, it has a +4 charge.

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Most popular questions from this chapter

What are the IUPAC names of the following compounds?

  1. Manganese dioxide
  2. Mercurous chloride (Hg2Cl2)
  3. Ferric nitrate [Fe(NO3)3]
  4. Titanium Tetrachloride
  5. Cupric bromide (CuBr2)

Using the periodic table, identify the heaviest member of each of the following groups:

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(c) Noble gases

(d) Alkaline earth metals

Write the molecular and empirical formulas of the following compounds:

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(b)

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Determine the number of protons, neutrons, and electrons in the following isotopes that are used in medical diagnoses:

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(c) atomic number 53, atomic mass number 131, charge of 1-

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(e) Name the elements in parts (a), (b), (c), and (d)

Each of the following compounds contains a metal that can exhibit more than one ionic charge. Name these compounds:

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b. MoO3

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