The elements are identified by its aomic number and they are placed in the periodic table in ascending order of atomic number.
There is one unique element for a given atomic number.
For example, atomic number 1 identifies Hydrogen and there cannot be another different element with the same atomic number.
All the elements with atomic numbers from 1 to 118 have been discovered. So, you know that there is not room for new products with atomic number equal or less than 118.
Answer:
The answer is A.) age
Explanation:
The older the sample, the more the sample will have decayed, and the less radioactive it will be.
B. A spacecraft that orbits a celestial body
Answer:
Arsenic (33As) has 33 known isotopes and at least 10 isomers.
Answer:
1* 6.022*10^23=6.022*10^23 molecules of CO2 are present.