When it comes to similarities of elements, the best solution is to look at the periodic table. Aside from arranging the elements according to the least to greatest atomic numbers, the columns called groups, have the same electronic configuration in their valence shell. They only differ in the energy levels. Therefore, all elements at the same period of Phosphorus have the same electronic configuration. The answers could be Nitrogen, Astatine, Antimony and Bismuth.
Answer:
5.64x10⁻³ g of S₈S₈
Explanation:
We consider mm as milimolal
Milimolal = molal . 1000
Molal are the moles of solute contained in 1kg of solvent.
Solute → Sulfur (S₈S₈)
Solvent → naphthalene
0.11 mm / 1000 = 1.1x10⁻⁴ molal
moles of solute / kg of solvent = 1.1x10⁻⁴ molal
moles of solute / 0.1 kg of solvent = 1.1x10⁻⁴ molal
moles of solute = 1.1x10⁻⁴ m/kg . 0.1kg → 1.1ₓ10⁻⁵ moles
Molar mass S₈S₈ = 512.96 g/m
1.1ₓ10⁻⁵ mol . 512.96 g/m = 5.64x10⁻³ g
Answer:
I don’t know which question you specifically need help with but an atom with 4 protons and 4 neutrons would be Beryllium. It is a neutral atom. It takes 4 electrons to make it neutral. Helium has 2 protons and 2 neutrons. It is also a neutral atom.
Explanation:
Friedrich Wohler was working with Ammonium Cyanate and found crystals of urea in his beakers
Salt water, since it is no longer a pure substance :)
