Rubidium has two isotopes, ½{37}{3}Rb and ½{8}{3}Rb.Which statement explains why both isotopes have the same chemical properties? A They have the same number of protons. B They have the same number of outer shell electrons. C. They have different numbers of neutrons. D They have...
Isotopes and Atomic Masses:The atomic mass of an element is the sum of the masses of all protons and neutrons in the nucleus in atomic mass units. An element exists in several isotopic forms in which two or more atoms have the same atomic number but different mass numbers or...
As you may know, atomic elements can have different isotopes, which are different versions of an element that have the same number of protons, but different numbers of neutrons contained within the nucleus. Thus, the atomic mass of these isotopes will be different, as will some of their phys...
(Tor). The physical properties of the three isotopes are different due to the difference in their masses, i.e. isotope effect. The chemical properties of the three isotopes are similar as they have the same electronic configuration. Reaction between hydrogen and oxygen is highly exothermic, and...
The researchers measured each molecule’s mass to estimate of the number of neutrons in a molecule’s radium nucleus. They then sorted the molecules by isotopes, according to their neutron numbers. In the end, they sorted out bunches of five different isotopes of RaF, each bearing more neu...
When Average atomic mass is in parentheses? For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses. Why are parentheses used to write the formula for AlOH3? Parentheses are used for the formula Al(OH)3 to indicate that the hydroxid...
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Potassium (K), thorium (Th), and uranium (U) are, importantly for this story, radioactively unstable elements. This means that they occur in a variety of atomic configurations that have variable numbers of neutrons. These variable composition atoms are known as ‘isotopes’, some of whi...
(a) What is the mass of this iceberg, gi Uranium ore has two main isotopes, mostly U-238 with just a trace amount of U-235. In a sample of Uranium ore, 99.85% of the atoms are U-238 atoms and 0.15% are U-235 atoms. Commercial dredging operations in ancient...
In fact, among stable isotopes of a given light element of the periodic table there is always that specified by Z = N , except for beryllium represented by a single stable nuclide, 94Be, with N /Z = 1.25. We take, as the starting point, the semiempirical Weizsäcker relation for the...