Elements are the simplest building blocks you can break matter down into using purely chemical methods. They are a pure substance made up from only one type of atom.
When you mix elements together these form compounds. The important difference is that as they are a mixture of more than one type of element, they CAN be broken down into more simple substances using chemical means!
As such Hydrogen or Oxygen cannot be simplified chemically (they are therefore elements), however dihydrogen monoxide (H2O or water) is a mixture of these elements that can be broken down using chemical means and so is a compound.
Answer:- Ca = +2, S = +6 and O = -2
Solution:- There are certain rules for oxidation numbers. As per the rule, oxidation number of alkaline earth metals in their compounds is +2.
Oxidation number of oxygen in it's compounds is -2(except peroxides) and the sum of oxidation numbers of all the elements of a neutral compound is zero.
Since, Ca is +2 and O is -2, the oxidation number of S could easily be calculated for the given compound as:
Let's say the oxidation number of S in 
is 
. Let's make the algebraic equation and solve it.
Hence. the oxidation number of Ca is +2, O is -2 and S is +6.
<span>Earth has a much greater mass than Pluto does, and therefore has stronger gravity.</span>
The correct answer is:
<span>37/20Ca --> 37/19K + 0/+1e
Explanation:
</span>Transmutation, conversion of 1 element<span> into another. A transmutation entails an </span>amendment within the<span> structure of atomic nuclei and </span>thus is also <span>induced </span><span>by an </span>action<span> (q.v.), </span>like nucleon<span> capture, or occur </span>ad libitum<span> by </span>decay<span>, </span>like disintegration<span> and </span>disintegration<span>(qq.v.)</span>
In order to solve this problem you need to consider the states of matter and the amount of products.
If there are more products than reactants than there is an increase in entropy.
States of matter: increasing the motion of particles increases entropy.
Molecular movement:
Solid<Liquid<Gas
Changing states of matter from left to right would be an increase in entropy.
Changing states of matter from right to left would be a decrease in entropy
The answer is number 3
