![]() Chemically, elements are the most basic compounds and hence cannot be broken down by chemical reactions. An isotope is one of two or more species of atoms of the same chemical element that have different atomic mass numbers (protons + neutrons). Since 1961 the standard unit of atomic mass has been one-twelfth the mass of an atom of the isotope carbon-12. The mass of one equivalent, that is, the mass of a given substance that can combine with or displace a fixed quantity of another substance, is known as equivalent weight. atomic weight, also called relative atomic mass, ratio of the average mass of a chemical element’s atoms to some standard. The density of an element that mixes with or displaces 1.008 grams of hydrogen, 8.0 gram of oxygen, or 35.5 grams of chlorine is its equivalent weight.Įquivalent Mass = \ The mass of one counterpart, that is, the mass of a given substance that can blend with or displace a fixed quantity of another substance, is known as equivalent weight. The equivalent weight of an element is its gram atomic weight divided by its valence (combining power). The number of electrons in an element's outer shell determines its valency. The valency of elements in the same group in the periodic table is the same. The combining force of an entity is known as valency. In chemistry, an element's valence or valency is a measure of its ability to combine with other atoms to form chemical compounds or molecules. The mass of an atom can be calculated by adding the sum of protons and neutrons and multiplying by 1 amu. This is due to the fact that each proton and neutron have the same atomic mass unit (amu). ![]() ![]() The mass number is the sum of the number of protons and neutrons in the nucleus of any given isotope. Element: Strontium: Atomic Number: 38: Symbol: Sr: Element Category: Alkaline Earth Metal: Phase at STP: Solid: Atomic Mass amu 87. (Atomic mass is also known as atomic weight, but "mass" is a more accurate term.) It's a loss of energy, but there's lots of energy in the star, so the loss of energy isn't a deal breaker. The atomic mass of an element is a weighted average of all its isotopes, where the mass of each isotope is multiplied by the abundance of that isotope. 1,601 13 27 Generally speaking, if the pressure is sufficient to overcome the coulomb barrier of Iron, you can get Iron Nuclei fusing with other Nuclei - forming heavier than Iron. ![]() Hint: An element is a substance whose atoms all have the same number of protons another way to put it is that all of the atoms in a given element have the same atomic number. ![]()
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