I Am A Gas With A Mass Number Of 19 (2023)

1. What gas has a mass number of 19? - Homework.Study.com

The chemical element fluorine is a gas that has a mass number of 19. Fluorine is a highly reactive gas that is yellow in color. Its symbol on the periodic ...
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The gas with a mass number of 19 is potassium-39 (K-39). Potassium-39 is an isotope of potassium, which is an alkali metal element found in Group 1 of the ...
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Answer:Element FluorineExplanation:The chemical element fluorine is a gas that has a mass number of 19.
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The element potassium has an atomic number 19 and a mass number is 39. Give the number of electrons, protons, and neutrons in it. Give the electronic configuration in different energy shells. Mention its valency.

Atomic number, Z. Element Symbol. Name. Atomic Mass, u. 3. Li. Lithium. 7.0. 4. Be ... NOBLE GAS. LANTHANIDE. ACTINIDE. Periodic. THE of Elements.. Table.
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Hydrogen (H, Z=1). ; Lithium (Li, Z=3). ; Sodium (Na, Z=11). ; Potassium (K, Z=19). ; Rubidium (Rb, Z=37).
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Read a brief summary of this topic ; plutonium, Pu, 94, (244) ; americium, Am, 95, (243).
Atomic weight, ratio of the average mass of a chemical element’s atoms to some standard. Since 1961 the standard unit of atomic mass has been one-twelfth the mass of an atom of the isotope carbon-12. Atomic weight is measured in atomic mass units (amu), also called daltons.
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