Basically they were fire, air, earth, and water. He has ways of defining everything that existed into these 4 categories. Things that became hot were fire, gases were all air, and rocks were earth. Just stuff.
4.See the Related Questions for how to determine the number of electrons in the outermost shell of all the elements!
There are 4 electronic shells in period 4 while there are 5 shells in period 5.Elements of period 4 are smaller in size as compared to elements of period 5.Example of period 4 element is potassium and period 5 element is tin.
NaHCO doesn't exist; NaHCO3 contain 4 elements.
Standard temperature is 0 degrees Celsius so you are looking for the elements that have a melting point above 0 degrees Celsius. The answer is 4 elements. Elements E, G, L, and Q.
All elements in the 4th period (elements with atomic number 19 to 36) have four energy levels.
Aristotles theory stated that all substances were built from 4 elements, earth, air, fire, and water
me
philosophing
pythias
Nichomachus...
Nichomachus...
aqua
365 BC
aristotles matrix
Sea urchin
Alexander the Great
ancient Greece