write defination on polyatomic ion,unit mass formula ,tissue , decompostion , endothermic reaction?
Answers
Answer:
In this article, we will discuss polyatomic ions.
Explanation: The prefix poly- means many, so a polyatomic ion is an ion that contains more than one atom. This differentiates polyatomic ions from monatomic ions, which contain only one atom. Examples of monatomic ions include \text{Na}^+Na
+
start text, N, a, end text, start superscript, plus, end superscript, \text{Fe}^{3+}Fe
3+
start text, F, e, end text, start superscript, 3, plus, end superscript, \text{Cl}^-Cl
−
start text, C, l, end text, start superscript, minus, end superscript, and many, many others. This article assumes you have a knowledge of basic monatomic ions as well as the conventions for naming ionic compounds and writing their chemical formulas.
Answer:
1)polyatomic ion
A molecular ion is a covalently bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero. Unlike a molecule, which has a net charge of zero, this chemical species is an ions.
2)unit mass formula
The formula mass of a substance is the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. The formula mass of a covalent compound is also called the molecular mass.
3)tissue
A tissue is a group of cells, in close proximity, organized to perform one or more specific functions. There are four basic tissue types defined by their morphology and function: epithelial tissue, connective tissue, muscle tissue, and nervous tissue.Apical surface: Microvilli, cilia, stereociliaBasal surface: Basement membrane, hemidesmosomesLateral surface: Adhering junctions, desmosomes, tight junctions, gap junctions
4)decompostion
Decomposition is the process by which dead organic substances are broken down into simpler organic or inorganic matter such as carbon dioxide, water, simple sugars and mineral salts.
5)endothermic reaction
Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products. These reactions lower the temperature of their surrounding area, thereby creating a cooling effect.