Chemistry

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When an unstable nucleus expels a positron ________. A) its mass number is decreased by four ... Started by tiara099	3 Replies 73 Views	Aug 27, 2018 by Tonny
In which case is chlorine in its highest oxidation state? A) sodium hypochlorite B) sodium ... Started by jilianpiloj	1 Replies 190 Views	Aug 27, 2018 by gasdhashg
Elements in the same period generally have A) different properties. B) similar properties. C) ... Started by scienceeasy	1 Replies 113 Views	Aug 27, 2018 by daiying98
What is the oxidation state of chromium in the compound K2Cr2O7? A) +4 B) +6 C) +7 D) ... Started by renzo156	1 Replies 122 Views	Aug 27, 2018 by emsimon14
In what way are the green chemistry production of biodiesel fuel and of soap different? A) ... Started by audragclark	3 Replies 75 Views	Aug 27, 2018 by jaykayy05
Carbon has ________ valence electrons. A) one B) two C) three D) ... Started by shenderson6	1 Replies 67 Views	Aug 27, 2018 by SeanoH09
All noble gases have ________ valence electrons. A) three B) five C) seven D) ... Started by imowrer	1 Replies 99 Views	Aug 27, 2018 by fromAlphatoOmega22
What is the oxidation state of the nitrogen atom in the compound NCl3? A) 0 B) +3 C) +5 D) ... Started by tatyanajohnson	1 Replies 152 Views	Aug 27, 2018 by enass
What is the oxidation state of the carbon atom in the compound CO2? A) +2 B) +3 C) +4 D) ... Started by newyorker26	3 Replies 232 Views	Aug 27, 2018 by kescobar@64
Iodine has ________ valence electrons. A) three B) five C) seven D) ... Started by deesands	1 Replies 99 Views	Aug 27, 2018 by akpaschal
The electrons in the outermost energy level of an atom are called A) group electrons. B) core ... Started by ENagel	1 Replies 242 Views	Aug 27, 2018 by quynhmickitran
Which atom(s) has a more positive oxidation state on the product side than the reactant side? ... Started by sabina	1 Replies 94 Views	Aug 27, 2018 by dyrone
Which of the halogens is a liquid at room temperature? A) fluorine B) chlorine C) bromine D) ... Started by armygirl	3 Replies 128 Views	Aug 27, 2018 by xoxo123
When nonmetal oxides react with water, the resulting solution is A) salty. B) acidic. C) ... Started by DyllonKazuo	1 Replies 82 Views	Aug 27, 2018 by tofugiraffe
In a chemical bond, which atom gets ownership the shared electrons? A) the larger element B) the ... Started by nenivikky	1 Replies 81 Views	Aug 27, 2018 by pallen55
How does the periodic table substantiate atomic theory? A) Both are theoretical and cannot ... Started by silviawilliams41	1 Replies 63 Views	Aug 27, 2018 by FergA
12C is the most stable carbon isotope. Indicate whether the statement is true or ... Started by D2AR0N	3 Replies 136 Views	Aug 27, 2018 by nothere
Which element is in the fourth period of the periodic table? A) N B) Ni C) Cd D) ... Started by bb	1 Replies 64 Views	Aug 27, 2018 by SamMuagrove
Which element is a very good conductor of electricity? A) oxygen B) bromine C) selenium D) ... Started by Zulu123	1 Replies 104 Views	Aug 27, 2018 by Leostella20
40Ar, 40K and 40Ca are isotopes. Indicate whether the statement is true or ... Started by folubunmi	1 Replies 78 Views	Aug 27, 2018 by Briannahope
35Cl and 37Cl are isotopes. Indicate whether the statement is true or ... Started by audragclark	3 Replies 86 Views	Aug 27, 2018 by GCabra
Which of the following elements may not have an oxidation number of -1? A) chlorine B) hydrogen ... Started by codyclark	1 Replies 106 Views	Aug 27, 2018 by zenzy
Which of the following elements may have +4 charge? A) magnesium B) aluminum C) carbon D) ... Started by dejastew	1 Replies 61 Views	Aug 27, 2018 by millet
Which of the following elements will react most vigorously with sodium? A) bromine B) chlorine ... Started by renzo156	1 Replies 98 Views	Aug 27, 2018 by daiying98
Which of the following elements may have a +3 charge when it becomes an ion? A) magnesium B) ... Started by Sufayan.ah	3 Replies 96 Views	Aug 27, 2018 by joshbk44