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 hav...
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...
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...
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...
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...
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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...
They have a chitinous exoskeleton and a pair of claws on the anterior portion of the body. Sexual dimorphism is well defined with males having large and well developed claws. They are omnivores and feed on algae and other small organisms....
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...
Nitrogen stable isotopes One of the principal arguments in support of the postulated high contribution of diazotrophic N2 fixation in the EMS is the depleted δ15N of dissolved nitrate in the deep water masses (e.g., Mahaffey et al., 2005). The measured value of 2.4 ± 0.1‰ (Pantoja et...