It is True because in the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.
Answer:
The bohr model is the model in use today
Leonardo de Vinci, Michelangelo, and Raphael.
Answer:
I don't really understand what you asking in this question so if you don't mind plz tell me in a better form
Answer:
3.40g/mL
Explanation:
Density is a measure of mass over volume, so to get the density all we have to do is divide the mass by the volume.
21.35g ÷ 6.28 mL = 3.40g/mL
