Would be great if own answer D. Guide Questions1. What are metalloids? Enumerate the elements considered to be metalloids.2. What's the importance of classifying elements by groups?

Answered: D. Guide Questions 1. What are…

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter6: The Periodic Table And Periodic Law

Section: Chapter Questions

Problem 38A

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Similar questions

Without consulting your textbook or notes, state as many points as you can of Dalton’s atomic theory. Explain in your own words each point of the theory.
Your friend tells you about an article that he read in a tabloid that reported the discovery of a new form of carbon containing eight protons in the nucleus of its atoms. He claims that scientists are eager to explore the properties of this new form of carbon. What is wrong with the tabloid's claim? a. Nothing. The claim is believable. b. The claim must be false because an atom with eight protons would be oxygen, which is already known. c. The claim must be false because all forms of carbon are already known.
Xenon An isotope of xenon has an atomic number of 54 and contains 77 neutrons. What is the xenon isotope’s mass number?
a. Classify the following elements as metals or nonmetals: Mg Si Rn Ti Ge Rn Au B Am Bi At Br b. The distinction between metals and nonmetals is really not a clear one. Some elements, called metalloids, are intermediate in their properties. Which of these elements would you reclassify as metalloids? What other elements in the periodic table would you expect to be metalloids?
Scientists J. J. Thomson and William Thomson (Lord Kelvin) made numerous contributions to our understanding of the atom’s structure. Which subatomic particle did J. J. Thomson discover, and what did this lead him to postulate about the nature of the atom? William Thomson postulated what became known as the “plum pudding” model of the atom’s structure. What did this model suggest?
For each of the negative ions listed in column 1, use the periodic table to find in column 2 the total number of electrons the ioncontains. A given answer may be used more than once. Column 1 Column 2 [ 1] Se2 [a] 18 [ 21 S2 [b] 35 [ 31 P3 [c] 52 [ 4] O2 [d] 34 [ 5] N3 [e]36 [6] I [f] 54 [7] F [g] 10 [8] Cl [h]9 [9] Br [i] 53 [101 At [j] 86
2.46 Why are nonmetals important even though they account for only a very small fraction of the elements in the periodic table?
Are most elements found in nature in the elemental or the combined form? Why? Name several elements that are usually found in the elemental form.
How is an atom’s atomic number related to its number ofprotons? To its number of electrons?
2.85 Describe how the saying “opposites attract” corresponds with the mathematical representation of Coulomb’s law shown in Equation 2.1. Remember that attractive forces have negative values and repulsive forces have positive values.
Given that the periodic table is an organizational scheme for the elements, what might be some other logical ways in which to group the elements that would provide meaningful chemical information in a periodic table of your own devising?
What defines an element? How many naturally occurring elements exist?

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D. Guide Questions 1. What are metalloids? Enumerate the elements considered to be metalloids. 2. What's the importance of classifying elements by groups?