Chemistry, 18.09.2019 22:50 xojade

An element is a main constituent of paper, diamond and clothes etc. it forms covalent bonds with itself and other elements: - (1) identify the element (2) write the electron dot structure of its oxide. (3) draw the electron dot structure of methane and ethene.

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Answer 1) Carbon - It is the element which is the main constituent of the paper in the form of cellulose, diamond is made of completely carbon and clothes are mostly made from carbon based fibers. Also, it forms covalent bonds with itself and other elements too because it has 4 valence electrons in its valence shell so, it can either donate or accept electrons to attain a stable octet state.

Answer 2) The electron dot structure of the oxides of carbon are of two types;

i) CO and ii) $CO_{2}$

The images are attached for the electron dot structures.

Answer 3) The structure of methane and ethene is attached in the image.

An element is a main constituent of paper, diamond and clothes etc. it forms covalent bonds with its

Answer from: Quest

water molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

Answer from: Quest

answer: h+ its less than oh

explanation:

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