The statement that describes a chemical reaction at equilibrium is 4)<span> </span><span>The concentrations of the products and reactants are constant.</span><span> </span>
An equilibrium reaction is a reaction in which the concentration of both reactant and products is the same.
That is, the rate of forward reaction is equal to the rate of backward reaction.
For example,
Thus, we can conclude that out of the given options, statement the concentrations of the products and reactants are equal, describes a chemical reaction at equilibrium.
Octet rule states that atoms tend to bond in order to have 8 electrons in their outer most electron orbit achieve stable configurations of noble gases.
When atoms form covalent bonds, they achieve the goal of having 8 electrons by sharing the electrons.
In ionic bond, atom either gain or lose an electron and form ions that have the stable configuration of 8 valence electrons.
Not all atoms follow the octet rule and there are many exceptions and variations.
An outline is a line drawn around an element, enclosing the element content, padding, and border spaces.
A form or figure's outline is defined by a line or combination of lines. The lines restrict the shape, isolating it inside the composition or the area. The shapes are created by the outlines.
The phrase "outline" in art refers to the lines, real or apparent, that define or confine a figure (or shape) within the field of vision, with the total number of these lines defining the contour of the figure.
An item is depicted by lines of contour without shade in an outline sketch or drawing, leaving out internal detail. A variety of markers are used to transform an object's seeming edge into a useful reference on paper.