(a)
Interpretation:
The letters for the position of halogens by using the periodic table in Figure 11-40 are to be identified.
Concept introduction:
Periodic table is a tubular form of elements, which is arranged by the
(b)
Interpretation:
The letters for the position of alkali metals by using the periodic table in Figure 11-40 are to be identified.
Concept introduction:
Periodic table is a tubular form of elements, which is arranged by the atomic numbers. Elements with similar properties appear in the same group in periodic table. Most of the groups form chemical families. Family trends are most apparent among the main group elements.
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Introductory Chemistry: An Active Learning Approach
- Make your own periodic table using the hypothetical elements that are given in the clues .Explain the words that will be formed if you arranged the symbols of elements correctlyarrow_forwardThere is a small portion of the periodic table that you must know to do organic chemistry. Construct this part from memory, using the following steps.(a) From memory, make a list of the elements in the first two rows of the periodic table, together with their numbers ofvalence electrons.(b) Use this list to construct the first two rows of the periodic table.(c) Organic compounds often contain sulfur, phosphorus, chlorine, bromine, and iodine. Add these elements to yourperiodic table.arrow_forwardWhich ion is incorrect? Group of answer choices Mg +2 S -2 Li + I -2 O -2 F -arrow_forward
- Read about Eu.What does its symbol stand for?What is its atomic number? How is it produced? Boron (Si, Ge...) is part of what category of elements?Where is it most widely distributed?What is the most widely used Silicon device?Watch the TED on the genius of Mendeleev.List two things you learnedWhy did Mendeleev's table endure?Watch the Crash Course in Chemistry (11:21)What is meant by the periodic nature of the table?What are alkali metals, how do they behave, and why?What are the transition metals and describe them and their importance.What are the Lanthanides and Actinides?What are Noble Gases?arrow_forwardFor 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] 86arrow_forwardSection 1-5 describes the postulates of Daltons atomic theory. With some modifications, these postulates hold up very well regarding how we view elements, compounds, and chemical reactions today. Answer the following questions concerning Dalton's atomic theory and the modifications 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 each other? c. How are atoms of hydrogen different from atoms of helium? How can H atoms be similar to He atoms? d. How is water different from hydrogen peroxide (H2O2) even though both compounds are composed of only hydrogen and oxygen? e. What happens in a chemical reaction and why is mass conserved in a chemical reaction?arrow_forward
- Using the information in Table 1-1, answer the following questions. In an ion with an unknown charge, the total mass of all the electrons was determined to be 2.55 1026 g, while the total mass of its protons was 5.34 1023 g. What is the identity and charge of this ion? What is the symbol and mass number of a neutral atom whose total mass of its electrons is 3.92 1026 g, while its neutrons have a mass of 9.35 1023 g?arrow_forwardThe compound hexaazaisowurtzitane is one of the highest-energy explosives known (C E News, Jan. 17, 1994, p. 26). The compound, also known as CL-20, was first synthesized in 1987. The method of synthesis and detailed performance data are still classified because of CL-20s potential military application in rocket boosters and in warheads of smart weapons. The structure of CL-20 is In such shorthand structures, each point where lines meet represents a carbon atom. In addition, the hydrogens attached to the carbon atoms are omitted; each of the six carbon atoms has one hydrogen atom attached. Finally, assume that the two O atoms in the NO2 groups are attached to N with one single bond and one double bond. Three possible reactions for the explosive decomposition ofCL-20 are i. C6H6N12O12(s)6CO(g)+6N2(g)+3H2O(g)+32O2(g) ii. C6H6N12O12(s) 3CO(g) + 3CO2(g) + 6N2(g) + 3H2O(g) iii. C6H6N12O12(s) 6CO2(g) + 6N2(g) + 3H2 (g) a. Use bond energies to estimate E for these three reactions. b. Which of the above reactions releases the largest amount of energy per kilogram of CL-20?arrow_forward
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