The atomic mass for each element in the Periodic Table the mass is the average of the masses of the isotopes of the element weighed with their abundances. The atomic masses of isotopes are given in amu.Answer and Explanation: The percent abundance of isotopes can be calculated from the averag...
The atom is the smallest representative unit of a single chemical element and it contains some numbers of protons, neutrons and electrons. The number of protons for an element is fixed and represented by its atomic number. The number of neutrons can vary, which is the basis for isotop...
Hydrogen is the lightest element in existence. Its atomic number is 1 and it is the first element listed on the periodic table. Hydrogen has three isotopes, H-1, H-2 and H-3.Answer and Explanation: The three isotopes of hydrogen are alike because they all have one proton. This is the...
However, if you have a large collection of americium atoms, then the rate of decay becomes quite predictable. For americium-241, half of the atoms decay in 458 years. Therefore, 458 years is the half-life of americium-241. Every radioactive element has a different half-life, ranging from...
However, if you have a large collection of americium atoms, then the rate of decay becomes quite predictable. For americium-241, half of the atoms decay in 458 years. Therefore, 458 years is the half-life of americium-241. Every radioactive element has a different half-life, ranging from...
Thus it becomes possible to synthesize elements with the atomic numbers 93, 94, and so forth, known as the transuranium elements. Nuclear chemistry knows many methods of producing these elements. At present, 12 transuranium elements are known, namely: neptunium, plutonium, americium, curium, be...
How many protons and neutrons are in americium-241? Which atom is an isotope of 84Be? Is oxygen-18 an isotope? How many isotopes does actinium have? Does each isotope have its own mass number, or does each element have a general mass number? If each element has a general mass number,...
How many protons does the isotope uranium-238 have? How many neutrons does berkelium have? How many neutrons are in an atom of cobalt-60? How many neutrons are in uranium-235? How many protons and neutrons are in americium-241? How many isotopes does californium have? How many neutrons do...
? Assuming the atom is uncharged, how many electrons are present? Protons and Neutrons:Protons and neutrons constitute two sorts of subatomic particles. Protons are drawn towards a negative charge, as they constitute a positive charge. Neut...
The half-life of radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain after 1000 years?First Order Reaction:The Order of the reaction is defined as the sum of the power of concentration in the rate law equation. It...