First you would multiply 5,3, and 2 to get a volume of 30. Density is mass over volume so you would then divide 129 by 30. You would get 4.3. The answer would be 4.3 g/cm^3
The elements are placed in specific places on the periodic table based on their atomic number and outer electronic configuration which gives them certain properties.
The elements of same groups have same number of valence electrons.
Group 1: one electron in valence shell
Group 2: two electrons in valence shell.
Helium has only two electrons in its outer shell and it is grouped with elements that have completely filled outer orbitals, noble gas.
I am pretty sure it was composed of mostly CO₂.
Answer:
A magician I saw once made a painting of a dove come to life. The bird literally flew out of the painting.
That happened 10 years ago and I'm still wondering how that is even possible.
Explanation:
