Answer:
The density is 0, 61 g/cm3
Explanation:
We calculate the density:
Density= mass/volume = 3,8 g/6, 28 cm3 = 0, 61 g/cm3
As overall compound is neutral so , let oxidation number of P be x
4(x) + (-2)8 = 0
x = +4
Unique archaea characteristics include their ability to live in extremely hot or chemically aggressive environments, and they can be found across the Earth, wherever bacteria survive. Those archaea that live in extreme habitats such as hot springs and deep-sea vents are called extremophiles.
B: nothing the color of the solution when heated
Answer:
Helium is in the __1__ period. All elements in this period have __8__ shells around the nucleus. Also giving brainiest :)