what happens to sun if it does not have any hydrogen?
the sun fuses hydrogen to helium in an atomic reaction similar to a hydrogen bomb, this reaction gives off energy and hence provides us with a lot radiant energy, most astronomers believe that the sun has been “turned on” for about 4.5 billion years. 

as the sun gets older, it will continue to fuse hydrogen in its core, scientists estimate that there is enough hydrogen fuel to continue this process for another 4 billion years or so, then the fun starts….

once the majority of the sun’s hydrogen is turned into helium, it stops fusing hydrogen and loses its ability to combat gravity, the sun will begin to compress under its own weight. the higher pressures and temperatures at the sun’s core will cause helium to begin to fuse into carbon in a similar process to the hydrogen fusion, this too balances out the gravity and the sun will continue to shine, but the process of fusing helium gives off more energy than the fusing of hydrogen. this additional energy streaming out of the core radiates through the “envelope”, the layers outside the core. this very high energy into the envelope heats up the envelope causing the envelope expand greatly to hundreds of times its original size. 

the part that can be seen (the envelope) is much cooler than the young sun was and it is red in color, the sun has become a red giant star. 

even though the red envelope is cooler than the young sun it is still very hot, about 5000° fahrenheit! unfortunately, for any life on planets in the inner solar system, the red giant sun's envelope will expand to engulf all the way out past earth and mars. all the oceans will be evaporated away and in fact the earth's atmosphere will be blown into space. the engulfed planets will, obivously, be uninhabitable.
holmes starved for three days without food and water to look really sick. reason: saturn has some unique characteristic like :-1. saturn has rings around it, these rings are made up of rocks, ice and dust.2. density of saturn is less than that of water (density is mass per unit volume), i.e. it is very light so if there were large enough ocean saturn would float on it. (a) the candidate was studying the effect/importance of sunlight on the rate of photosynthesis.explanation: the candidate had covered one part of the leaf to study the rate of photosynthesis in the absence of sunlight. the candidate would compare it with the rate of photosynthesis on the uncovered parts of the leaf and thus, determine the role of sunlight during photosynthesis.(b) yes, the uncovered portion of the leaf of the potted plant is used as the control here.explanation: the control is used to compare the results which will be obtained after the experiment with the covered portion of the leaf to obtain conclusions.(c) plant was kept in the dark before the experiment, to remove the starch present in the leaf, to the storage organs.explanation: destarching is done by placing the plant for 24-48 hours in darkness before starting the experiment. this is done to make sure that all starch has been formed under experimental conditions only.(d) 1) first, the candidate would have dipped the prepared leaf in boiling water to kill the leaf cells.2) then he would have boiled the leaf in methylated spirit to remove the chlorophyll.3) the leaf would have then been placed in hot water to soften it.4) he would have placed it in a dish and poured iodine solution. the presence of starch is confirmed in regions that turn bluish-black in colour.the uncovered portion of the leaf would have turned bluish black and the cover region would have turned brown in colour.explanation: the uncovered portion of the leaf would have turned bluish black as starch would have formed in those regions. sunlight activates the chlorophyll, which in turn catalyzes the photosynthesis reaction. in the covered portion, on which sunlight could not have penetrated, the region turns brown due to the absence of chlorophyll. this implies that photosynthesis would not have taken place on the covered portion of the leaf. In chemistry, a dangling bond is an unsatisfied valence on an immobilized atom.  
  
In order to gain enough electrons to fill their valence shells many atoms will form covalent bonds with other atoms. In the simplest case, that of a single bond, two atoms each contribute one unpaired electron, and the resulting pair of electrons is shared between both atoms. Atoms which possess too few bonding partners to satisfy their valences and which possess unpaired electrons are termed free radicals; so, often, are molecules containing such atoms. When a free radical exists in an immobilized environment, for example, a solid, it is referred to as an &quot;immobilized free radical&quot; or a &quot;dangling bond&quot;. hydroponics is a type of horticulture and a subset of hydroculture which involves growing plants (usually crops) without soil, by using mineral nutrient solutions in an aqueous solvent. terrestrial plants may grow with their roots exposed to the nutritious liquid, or, in addition, the roots may be physically supported by an inert medium such as perlite, gravel, or other substrates. magnesium atom loses 2 electrons to attain a stable electronic configuration and becomes a cation. example: a non-metallic atom like chlorine gains 1 electron to attain a stable electronic configuration and becomes an anion. example: cations and anions are oppositely charged particles which attract one another to form an electrovalent bond leading to the formation of an electrovalent compound here magnesium donates one electron each with two chlorine atoms resulting in the formation of magnesium chloride. kiwi is not known to be affected see link below.

[security advisory | solarwinds](https://www.solarwinds.com/securityadvisory) hydrocarbons are the compounds of hydrogen and carbon. they are the simplest of all the organic compounds.hydrocarbons are of two types:(i) organic (ii) inorganic due to o2 there occurs destruction
or oxidation of photosynthetic pigments and intermediate, this
process is photo oxidation as it destructs pigments it is surely
harmful to plants the percent ionization of nh3 will increase.