![]() ![]() Overusing our search engine with a very large number of searches in a very short amount of time.Using a badly configured (or badly written) browser add-on for blocking content.Running a "scraper" or "downloader" program that either does not identify itself or uses fake headers to elude detection.Using a script or add-on that scans GameFAQs for box and screen images (such as an emulator front-end), while overloading our search engine.There is no official GameFAQs app, and we do not support nor have any contact with the makers of these unofficial apps. Continued use of these apps may cause your IP to be blocked indefinitely. This triggers our anti-spambot measures, which are designed to stop automated systems from flooding the site with traffic. Some unofficial phone apps appear to be using GameFAQs as a back-end, but they do not behave like a real web browser does.Using GameFAQs regularly with these browsers can cause temporary and even permanent IP blocks due to these additional requests. If you are using the Brave browser, or have installed the Ghostery add-on, these programs send extra traffic to our servers for every page on the site that you browse, then send that data back to a third party, essentially spying on your browsing habits.We strongly recommend you stop using this browser until this problem is corrected. The latest version of the Opera browser sends multiple invalid requests to our servers for every page you visit.The most common causes of this issue are: 1999‑2023 - All Rights Reserved.Your IP address has been temporarily blocked due to a large number of HTTP requests. Retrieved from Ĭopyright © Israel Science and Technology Directory. "Sortable list of elements of the Periodic Table". The story behind the discovery that elements are born in stars.Atomic Weights of the Elements (From IUPAC).Multilingual Dictionary and Etymology of the Periodic Table Elements.Atomic Reference Data for Electronic Structure Calculations.List of Periodic Table Elements in Hebrew.Other resources related to the Periodic Table Thus, alkali metals have the lowest IE in a period and, Rare gases have the highest. IE decreases going down a column of the periodic table, and increases from left to right in a row. Reference: NIST Reference Table on Ground states and ionization energies for the neutral atoms. To convert to kJ/mol, multiply by 96.4869. The table lists only the first IE in eV units. Ionization energy (IE): The energy required to remove the outermost electron from an atom or a positive ion in its ground level. ![]() For these elements, the weight value represents the mass number of the longest-lived isotope of the element.Įlectron configuration: See next page for explanation of electron configuration of atoms. The elements marked with an asterisk have no stable nuclides. The values shown here are based on the IUPAC Commission determinations ( Pure Appl. For relative abundances of isotopes in nature, see reference on Atomic Weights and Isotopic Compositions.Ītomic weight: Atomic weight values represent weighted average of the masses of all naturally occurring isotopes of an element. The abundance of each isotope depends on the source of materials. For example, the two common isotopes of carbon, 12C and 13C, have 6 and 7 neutrons, respectively. Elements have more than one isotope with varying numbers of neutrons. The isotope of an element is defined by the sum of the number of protons and neutrons in its nucleus. Isotope: Atoms of the same element with the same atomic number, but a different number of neutrons. Thus, each proton and neutron has a mass of about 1 amu. This isotope of carbon has 6 protons and 6 neutrons. Atomic mass is measured in Atomic Mass Units (amu), which are scaled relative to carbon, 12C, that is taken as a standard element with an atomic mass of 12. Each element is uniquely defined by its atomic number.Ītomic mass: The mass of an atom is primarily determined by the number of protons and neutrons in its nucleus. boiling pointĪtomic number: The number of protons in an atom. For the Year of Discovery of each elements see the list with the English and Hebrew names. ![]() For these elements, the weight value shown represents the mass number of the longest-lived isotope of the element.
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