WebIt has two extra electrons. The formula of this ion: Cr4O2^- CrO4^2+ CrO4^2- CrO4^2- he polyatomic ion with the formula CN- is called The polyatomic ion with the formula HPO42- is called cyanide hydrogen phosphate The formula for the compound ammonium chloride: NH4Cl+ NH4Cl NH3Cl NH4Cl2 NH4Cl he formula for ammonium carbonate: NH4HCO3 … Webfluorine (F), most reactive chemical element and the lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Its chemical activity can be attributed to its extreme ability to attract …
Chapter 2: Basic Chemistry Flashcards Quizlet
WebA. 7 valence electrons. B. 6 valence electrons. C. 3 valence electrons. D. 1 valence electrons. Describe two ways that an ion forms from an atom. An ions forms when an atom or group of atoms loses (cations) or gains (anion) electrons. How many electrons must an atom of each element lose to attain a noble-gas electron configuration? A. Ca. WebF- to attain the electron configuration of nearest noble gas Ne and become a negatively charged anion. Mg+2 to attain electron config of Ar and form a positively charged cation. Rb+ to attain electron config of nearest noble gas Xe and form a positive ion. bleve elasticsearch
1st Year Chemistry Chapter 6 Short Questions Notes PDF
WebIn this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and … WebWhey the electron affinity of fluorine is less than chlorine? The electron affinity of the elements increases left or right in a period and decreases down the group. But exceptionally fluorine has electron affinity less than that of chlorine. Reason: Fluorine has very small size and seven electrons in 2s and 2p subshells have thick electronic ... WebNov 24, 2024 · Anions Some atoms have nearly eight electrons in their valence shell and can gain additional valence electrons until they have an octet. When these atoms gain electrons, they acquire a negative charge because they now possess more electrons than protons. Negatively charged ions are called anions. blev con construction