Chapter 2: 45E (page 46)
What is the symbol for an ion with 63 protons, 60 electrons, and 88 neutrons? If an ion contains50 protons, 68 neutrons, and 48 electrons, what is its symbol?
Short Answer
The ion and symbol are europium and Tin .
Chapter 2: 45E (page 46)
What is the symbol for an ion with 63 protons, 60 electrons, and 88 neutrons? If an ion contains50 protons, 68 neutrons, and 48 electrons, what is its symbol?
The ion and symbol are europium and Tin .
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Get started for freeThe compounds AICI3, CrCL3, and ICI3 have similar formulas, yet each follows a different set ofrules to name it. Name these compounds, and then compare and contrast the nomenclature rules used in each case.
Identify the elements that correspond to the following atomic numbers. Label each as either anoble gas, a halogen, an alkali metal, an alkaline earth metal, a transition metal, a lanthanidemetal, or an actinide metal.
a. 17
b.4
c. 63
d. 72
e. 2
f. 92
g. 55
One of the best indications of a useful theory is that it raises more questions for furtherexperimentation than it originally answered. Is this true of Dalton's atomic theory? Giveexamples.
Section 2.3 describes the postulates of Dalton's atomic theory. With some modifications, thesepostulates hold up very well regarding how we view elements, compounds, and chemicalreactions today. Answer the following questions concerning Dalton's atomic theory and themodifications made today.
a. The atom can be broken down into smaller parts. What are the smaller parts?
b. How are atoms of hydrogen identical to each other, and how can they be different from eachother?
c. How are atoms of hydrogen different from atoms of helium? How can H atoms be similar to Heatoms?
d. How is water different from hydrogen peroxide even though both compounds arecomposed of only hydrogen and oxygen?
e. What happens in a chemical reaction, and why is mass conserved in a chemical reaction?
For each of the following sets of elements, label each as either noble gases, halogens, alkalimetals, alkaline earth metals, or transition metals.
a. Ti, Fe, Ag
b. Mg, Sr, Ba
c. LI, K, Rb
d. Ne, Kr, Xe
e. F, Br, I
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