When was the idea of the atom first introduced?
wasnt it around 450 B.C..
Some claim Demotricus introduced it, as the "atomos", but I am not certain on reading his works he understood it as the thing we know as the atom. The best dating we can do is that Leucippus in 420 BC used the concept. They both saw the matter as being an indivisible particle of matter. We generally see the atom as that, but knowing it really can be broken apart.
http://scienceworld.wolfram.com/physics/Atom.html
2+2=
The answer to the equation 2+2 is 4.
To solve this equation, you simply add the two numbers together. In this case, adding 2 and 2 gives you a sum of 4.
Mathematically, you can represent it as:
2 + 2 = 4
This is a basic addition problem and can be solved by using the concept of combining the values of the numbers being added. In this case, you are adding 2 and 2, which gives you a total of 4.