Which isotope is used for a standard for all other atomic masses? What are the elements of an isotope? What is the mass number of an isotope? What is an isotope in geochemistry? What do all isotopes of the same element have in common?
Isotopes are atoms of the same element, meaning they have the same number of protons and electrons but that have different numbers of neutrons. The different numbers of neutrons give isotopes different masses. Back in the early 1900s, the discoverer of the electron, JJ Thompson with the help ...
Which of the noble gases has only radioactive isotopes? What is the atomic number for argon? Write the ground-state electron configuration of element W using the Noble gas shorthand. Why is hydrogen not a noble gas? What do the electron configurations for all the group 18 noble gases have ...
What is the most common isotope of argon? Isotopes Explained: Elements are classified by the number of protons in the nucleus of the atom. However, there is no set rule for how many neutrons can be in the atom's nucleus. Because this number can vary, we classify the different, naturally...
Allotropes are different forms of the same element with distinct physical or chemical properties; Isotopes are atoms of the same element with differing numbers of neutrons.
Are all isotopes radioactive? No, only some isotopes are radioactive; others are stable. 6 Why do isomers have different boiling points? The differences in molecular structure among isomers can lead to variations in physical properties like boiling points. 6 How do isomers differ from each other...
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Note: This is one of a series of simple pages introducing key concepts in introductory chemistry. Other pages in this section includeelements, mixtures and compoundsand individual pages aboutsubstances,elements,mixturesandcompounds, plus pages aboutatoms,moleculesandisotopes.If you need further information...
What are all the synthetic elements? How are natural elements formed? How many natural elements are metals? Are native elements silicates? What elements are found in the biosphere? Which elements found in nature have mainly radioactive isotopes?
How many valence electrons do the noble gases possess? Why is hydrogen not a noble gas? What are three properties of nonmetals? Which of the noble gases has only radioactive isotopes? What are some chemical properties of einsteinium?