Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 7: Problem 79

Consider the stable elements through lead (Z = 82). In how many instances are the atomic weights of the elements out of order relative to the atomic numbers of the elements?

Short Answer

Expert verified
There are \(3\) instances where the atomic weights are out of order relative to the atomic numbers of the elements up to lead (Z = 82), namely: 1. Argon (Z = 18, A = 39.95) and Potassium (Z = 19, A = 39.10) 2. Cobalt (Z = 27, A = 58.93) and Nickel (Z = 28, A = 58.69) 3. Tellurium (Z = 52, A = 127.60) and Iodine (Z = 53, A = 126.90)

Step by step solution

01

Identify the elements to consider

We need to consider the elements up to lead (Z = 82). This means we will consider all the elements from hydrogen (Z = 1) to lead (Z = 82).
02

List the atomic weights and atomic numbers

Obtain a list of atomic weights and atomic numbers for these elements. This information can be found on a periodic table or other reliable sources.
03

Compare the atomic weights and atomic numbers

Go through the list and compare each element's atomic weight to the atomic weights of elements with lower atomic numbers. If the atomic weight is less than that of an element with a lower atomic number, it's considered out of order.
04

Count the instances

Keep track of the number of instances where the atomic weights are out of order relative to the atomic numbers. After carefully analyzing the elements up to lead (Z = 82) and comparing their atomic weights and atomic numbers, it turns out that there are \(3\) instances in which the atomic weights are out of order relative to the atomic numbers of the elements: 1. Argon (Z = 18, A = 39.95) and Potassium (Z = 19, A = 39.10) 2. Cobalt (Z = 27, A = 58.93) and Nickel (Z = 28, A = 58.69) 3. Tellurium (Z = 52, A = 127.60) and Iodine (Z = 53, A = 126.90) Thus, there are \(3\) instances in which the atomic weights are out of order relative to the atomic numbers.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Chlorine reacts with oxygen to form \(\mathrm{Cl}_{2} \mathrm{O}_{7}\) . (a) What is the name of this product (see Table 2.6) ? (b) Write a balanced equation for the formation of \(\mathrm{Cl}_{2} \mathrm{O}_{7}(l)\) from the elements. (c) Would you expect \(\mathrm{Cl}_{2} \mathrm{O}_{7}\) to be more reactive toward \(\mathrm{H}^{+}(a q)\) or \(\mathrm{OH}^{-}(a q) ?(\mathbf{d})\) If the oxygen in \(\mathrm{Cl}_{2} \mathrm{O}_{7}\) is considered to have the \(-2\) oxidation state, what is the oxidation state of the Cl? What is the electron configuration of Cl in this oxidation state?

What is the relationship between the ionization energy of an anion with a \(1-\) charge such as \(F^{-}\) and the electron affinity of the neutral atom, \(\mathrm{F}\) ?

Consider the first ionization energy of neon and the electron affinity of fluorine. (a) Write equations, including electron configurations, for each process. (b) These two quantities have opposite signs. Which will be positive, and which will be negative? (c) Would you expect the magnitudes of these two quantities to be equal? If not, which one would you expect to be larger?

Silver and rubidium both form \(+1\) ions, but silver is far less reactive. Suggest an explanation, taking into account the ground-state electron configurations of these elements and their atomic radii.

Using only the periodic table, arrange each set of atoms in order of increasing radius: (a) Ba, Ca, Na; (b) In, Sn, As; (c) Al, Be, Si.
See all solutions

Recommended explanations on Chemistry Textbooks

Inorganic Chemistry

Read Explanation

Kinetics

Read Explanation

The Earths Atmosphere

Read Explanation

Organic Chemistry

Read Explanation

Physical Chemistry

Read Explanation

Ionic and Molecular Compounds

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free