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what is the chemical formula for photosynthesis ?

Actually it is a process in which the green plants synthesize their food from the water and carbondioxide in the presence of sunlight and chloroplast. The following reaction depicts the chemical change during photosynthesis.

what kind of substance are alloys ?

Today we are in a modern era where a lot modernisation has took place. In the field of metals various metals are mixed to get the desired properties. The alloys are used in transportations , machines , telecommunications and a lot more. Basically the alloy is the homogenous mixture two or more metals and some

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How the atomic size changes when we move from left to right in a period in modern periodic table ?

The atomic Size is an important property that governs various behaviours of an atom or an element, like valency , electronegativity and metallic character. when we move from left to right the nuclear charge increases at every increase of atomic number. Due to increase in nuclear charge the electrons are attracted towards nucleus with more

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is burning a chemical change ?

Yes it is a chemical change as it involves the formation of ash and releases heat. Which can not be reversed to get fuel. In a chemical change the change of properties take place . For example we can write on paper and can fold it ,but if we burn it we get ash and

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how did mendeleev arrange chemical elements ?

Mandleev arranged the elements on the basis of increasing order of the atomic masses of the elements. He divided the 63 elements which were known or discovered at that time. There were 8 groups and 6 periods in his Periodic Table. Most importantly he made cards of every element , and wrote the reactions of

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Is it compulsory to read periodic classification of elements before chemical bonding or Can I start chemical bonding before periodic classification?

Actually chemical bonding is based on the Atomic number and electronic configuration. And the main thing is valency which is based on the number of outer(valence) electrons. Valency decides that how many bonds can be made by an atom . Thus if you ignore periodic table, you have to learn atomic number and electronic configuration

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The electrons that gain enthalpy for metals is positive and negative for non metals. Also, if metals are bigger in size than non metals then, how can electrons gain enthalpy is inversely proportional to the atomic size?

The answer is simple, like you are hungry you can pay more to get the food than that of the person who is less hungry, Similarily here the non metals want electrons thus they spend the energy more , or they release the energy. By this they lose the energy. So smaller is the size

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Is rusting a chemical change ?

Chemical change is a change in which a new substance is formed which is have totally new properties . And during rusting of iron, the iron oxide is formed that will not show the shine of metal, will not be a good conductor of electricity etc. thus rusting is a chemical change.

how do enzymes catalyze chemical reactions ?

The enzymes increase the surface area and makes it available for reactants to come closer and react. Thus this makes it easy for the reactants to react faster and thus the rate of chemical reaction increses.

how is the chemical symbol of an element determined ?

To determine the chemical symbol of an element we follow 2 main rules given below :- 1. The symbol of every element is expressed with capital letter. 2. If symbol includes more than one alphabet , then the first alphabet will be in capital case and second will be in lower case.

what happens to atoms in a chemical reaction ?

During a chemical change or chemical reaction , the new substances are formed with different properties. But, The atoms remain unchanged during a chemical reaction. Only their rearrangement takes place. As shown below :- 3Fe(s)  + 4 H2O(l) ——–> Fe3O4 (s) + 4 H2(g)

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