An atom (derived from the greek word atomos meaning indivisible) is the smallest unit of matter that cannot be further broken down and still retain the same characteristics and identity of its original element. its basic components are the subatomic particles known as

Explanation:

It is known that every matter present in this Universe is made up of atoms. And, an atom cannot be further broken down into simpler substances.

An atom holds three subatomic particles that are protons, neutrons and electrons.

Protons and neutrons a re placed inside the nucleus of an atom whereas electrons revolve around the nucleus of the atom.

Hence, we can conclude that an atom (derived from the greek word atomos meaning indivisible) is the smallest unit of matter that cannot be further broken down and still retain the same characteristics and identity of its original element. its basic components are the subatomic particles known as protons, neutrons and electrons.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: