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  1. Germanium compounds are chemical compounds formed by the element germanium (Ge). Germanium is insoluble in dilute acids and alkalis but dissolves slowly in hot concentrated sulfuric and nitric acids and reacts violently with molten alkalis to produce germanates ([GeO3]2−).

  2. Recognize ionic compound, molecular compounds, and acids. Give the names and formulas for ionic compounds; Give the names and formulas for molecular compound s; Give the name and formula for acidic compound

  3. A new germanium(II) phosphate, sodium tetragermanium tris(phosphate), Na[Ge 4 (PO 4) 3], has been synthesized by a solid-state reaction. The compound is isotypic with A[Sn 4 (PO 4) 3](A = Na, K, NH 4). It features a [Ge 4 (PO 4) 3] framework made up of GeO 3 pyramids and PO 4 tetrahedra, which are linked by shared corners, yielding a three ...

  4. We use parentheses in a formula to indicate a group of atoms that behave as a unit. For example, the formula for calcium phosphate, one of the minerals in our bones, is Ca 3 (PO 4) 2. This formula indicates that there are three calcium ions (Ca 2+) for every two phosphate (PO 4 3−) (PO 4 3−) groups.

  5. The elements in group 2 (the second column) form compounds consisting of one atom of the element and two atoms of hydrogen: These are called alkaline earth metals, with similar properties among members of that group.

  6. A chemical formula is a concise list of the elements in a compound and the ratios of these elements. To better understand what a chemical formula means, we must consider how an ionic compound is constructed from its ions.

  7. 1 mar 2008 · A new series of isostructural open-framework tin(II) phosphates with general formula A[Sn4(PO4)3], where A=Na, K, NH4, has been synthesized by hydrothermal methods.

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