Which of the following elements is a transition metal? a. Br b. Be c. N d. K e. Ce Transition Metal: The transition metal is the ones that participate in the formation of different types of chemical bonds of substances. These elements belong to the d- block....
Which of the following categories includes two-thirds of all elements? a. metalloids b. metals c. liquids d. nonmetals Types of Elements in the Periodic Table: The periodic table is an arrangement of elements into various horizontal rows called periods...
Which leads the beauty Hag a hembronk an tekter langbot This is the story of those Cornishmen who responded to the call to arms of the Great War and the events which lead them to the most bloody of its battles, the Somme, on 1st July 1916. Henn yw hwedhel an Gernowyon na ...
c. Na d. Mg e. Cl Electronegativity: Electronegativity refers to how strongly an atom attracts a pair of bonding electrons in a covalent bond. The more strongly it attracts the electrons, the more electronegative it is. Electronegativity increases when an atom has more ...
The new stabilized diazo compounds of the present invention correspond most probably to 35 the following general formula: x 1.jj,-N=-G(-Q9-Z.)^ where X and Y stand for halogen, alkyl, alkoxy, aryloxy, the nitro group and the group CF3, G stands for a guanidine radical free from sub...
Which of the following groups of the periodic table is the least reactive? a. Group 1 b. Group 2 c. Group 13 d. Group 18 Periodic Table of Elements: The Periodic Table of Elements presents the elements such that those that have similar ...
Which atom has the larger atomic radius: Ta or V? Which of the following elements has the largest electron affinity? a. Oxygen b. Sulfur c. Selenium d. Tellurium Which is the larger atom: Ne or Na? Explain. which has the higher ionization energy Ne or O2- ...
the latter may be fused to a saturated or unsaturated carbocyclic ring system, it being possible for the ring to be substituted with one or more groups R5 --which are lower alkyl or lower alkoxy having one to four carbon atoms, or halogen; Y is an alkenylene bridge containing from 3 to...
(NOR78)-aryl radical, and a (C1-C6)alkyl group optionally substituted by one or more halogen atoms, the aryl and heteroaryl unit of said radical, when present, being optionally substituted by one or more groups selected from a halogen atom, a —CN, —OH, (C1-C6)alkyl, (C1-C6)alkoxy...
The manner in which the compounds of the invention can be made will be further understood by way of the following Examples. Method A Synthesis of N-(5-tert-Butyl-isoxazol-3-yl)-2-methyl-2-(4-trifluoromethylbenzenesulfonyl)-propionamide (Example 6 in Table 19) Step 1: Synthesis of 2-Methy...