Chemistry

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Subject / Started by	Replies / Views	Last post
The neutral atom contains equal numbers of protons and electrons. Started by tingc95	1 Replies 56 Views	Mar 24, 2020 by frogdreck123456
Different elements can contain the same atoms. Started by cool	1 Replies 52 Views	Mar 24, 2020 by Edwyer
The half life of a specific Tc-99m is 6 hours. How much of an 192 mg sample will have decayed after 30 hours? Started by naturalchemist	1 Replies 184 Views	Mar 24, 2020 by nathang24
In order to have 1/16 of a radioactive sample left how many half lives must the sample go through to ... Started by JGIBBSON	1 Replies 126 Views	Mar 24, 2020 by ntsoane kedibone
The correct symbol for the positron is: Started by saraeharris	1 Replies 49 Views	Mar 24, 2020 by Missbam101
What protective shielding is sufficient for gamma rays? Started by ahriuashd	1 Replies 87 Views	Mar 24, 2020 by harveenkau8139
The form of radioactivity that penetrates matter the least is: Started by segrsyd	1 Replies 42 Views	Mar 24, 2020 by stallen
Made up of helium nuclei traveling at 5-7% speed of light: Started by stevenposner	1 Replies 70 Views	Mar 24, 2020 by britb2u
A hypothetical element contains three isotopes of mass 16.0 amu, 17.0 amu, and 18.0 amu with ... Started by craiczarry	1 Replies 59 Views	Mar 24, 2020 by rachel
Adding one proton to the nucleus of an atom: Started by abern	1 Replies 60 Views	Mar 24, 2020 by ApricotDream
Cobalt is element 27. Cobalt-60 is used in the medical treatment of cancer. How many neutrons and ... Started by asd123	1 Replies 120 Views	Mar 24, 2020 by jlaineee
Mercury-202 has how many neutrons in its nucleus? Started by Themember4	1 Replies 57 Views	Mar 24, 2020 by ilianabrrr
Which one of the following carries no electrical charge? Started by littleanan	1 Replies 39 Views	Mar 24, 2020 by T4T
Calculate the densities of the following objects. in g/mLA)A mass of 86 g and a volume of 95 mL.B)A ... Started by jparksx	1 Replies 75 Views	Mar 24, 2020 by Ksh22
Express the following quantities in joules.A)74.6 calB)1.45 104 kcalC)296 Cal Started by cartlidgeashley	1 Replies 72 Views	Mar 24, 2020 by kaykay69
Perform the following conversions within the metric system.A)55 cm = ________ mB)9535 m = ________ ... Started by dalyningkenk	1 Replies 67 Views	Mar 24, 2020 by jesse.fleming
Perform the following mathematical operations. Give the answer with the proper number of significant ... Started by anshika	1 Replies 83 Views	Mar 24, 2020 by aadams68
Express the following in exponential form:A)5765B) 0.000365C) 102,000D) 0.00000240E) 602,000,000,000F) 2000 Started by HCHenry	1 Replies 83 Views	Mar 24, 2020 by kswal303
Identify the number of particles of each element in the following compounds:A)H2O2 hydrogen ... Started by Yolanda	1 Replies 93 Views	Mar 24, 2020 by asdfasdf
A Calorie is equivalent to 1000 calories. Started by sabina	1 Replies 54 Views	Mar 24, 2020 by makaylafy
1 m = 10-6m Started by bobypop	1 Replies 100 Views	Mar 24, 2020 by scottmt
A group is a vertical column on the periodic table. Started by berenicecastro	1 Replies 87 Views	Mar 24, 2020 by medine
An example of a chemical reaction is: Started by saraeharris	1 Replies 47 Views	Mar 24, 2020 by courtney_bruh
Which of the following is not a physical change? Started by khang	1 Replies 100 Views	Mar 24, 2020 by mcabuhat
Using Table 1.4 in the text, determine which of these substances would show the largest temperature ... Started by londonang	1 Replies 63 Views	Mar 24, 2020 by SeanoH09

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