A nitrogen isotope with an atomic mass of 15, and an atomic number of 7, must have: 7 neutrons and 8 electrons 8 neutrons and 7 protons 7 electrons and 8 protons 8 protons and 7 neutrons 7 protons and 8 electrons

How many protons are present in the atomic nucleus of oxygen (based on the atomic number)? 8 protons 16 protons 24 protons 32 protons 40 protons

Complete the following table Symbol # protons # electrons # neutrons Atomic Mass Number Number 60CO 27 53 127 25 34 80

Which of the following is not a fundamental subatomic particle that forms elements? Which of the following is not a fundamental subatomic particle that forms elements? electrons protons nucleus neutrons

Sort the subatomic particles according to their masses. Drag each subatomic particle into the correct bin. electron proton neutron mass of ~ 1 amu mass of ~ 1/2000 amu

Many radioactive isotopes are used in medicine for imaging and treatment purposes. The specific isotopes used depends on the particular organ or body system being studied (for example, Xe-133 is used to image lung function and blood flow.) Technetium-99m is a common radioactive isotope using for a variety of medical applications.  It is produced from the decay of Molybdenum-99 and has a half-life of 6.01 hours. What are some of the applications of Tc-99m? While harder to access, another radioactive isotope of technetium, Tc-93, has a half-life of 2.73 hours.  If it were easier to harvest, would this be a good substitute for Tc-99m? (remember to explain why for full credit) While Tc-99m has a half-life of 6.01 hours, its decay product has a half-life of 213,000 years.  While the medical community considers it to be reasonably safe, within the limits of testing, does this make sense considering both chemical and biological principles? What are possible ways that you might deal with or…

The decay of an isotope element follows a first-order reaction. Assuming that you start with 964 mg of the isotope element sample, after 39.4 hours of decay, you find that there is 275 mg of the sample remaining. What is the half-life time of this reaction?

what is a isotope

if 10 magnesium atoms and 10 chlorine atoms were allowed to bump into each other, could they combineto form a substance?

In 300-400 words (which is about 20 sentences, 1 longer paragraph, or 2 shorter paragraphs), please use your own words to summarize the chemical properties of water and explain two or more reasons why living things need water.