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...
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...
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,...
The radioactive element Americium-241 has a half life of 432 years. Suppose, we start with a 20 g mass of Americium-241, how much will be left after 321 years? The half-life for the radioactive decay of U-238 is 4.5 billion years and is i...
How do radioactive isotopes decay? Does beta decay change the atomic mass? What is the difference between alpha, beta, and gamma decay? What is emitted from the nucleus during beta decay? What does americium-243 turn into after alpha decay?
? 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...