Answer:
See explanation
Explanation:
If we look at the electron configuration closely, we will discover that the element must have had a ground state electron configuration of 2,4.
This is because, the innermost shell usually holds two electrons while the outer shells hold eight electrons each. The four electrons must be accommodated in the second shell in the ground state configuration of the compound.
However, when the atom is excited, one electron from this shell may move to the third shell to give the excited state configuration 2-3-1 as shown in the question.
In chemistry, "chemical properties" of elements usually refers to the electron affinity of an atom (number of valence electrons) This is because atoms with the same number of valence electrons will form similar compounds with other atoms, and undergo the same types of reactions.
Out of this list: He, Ne and Ar are all group 18 elements (Noble gases)
Therefore they have similar chemical properties.
Ionic bonds, metallic bonds and hydrogen bonds, and covalent bonds.
Answer:
Explanation:
The balanced equation is
CaCO₃(s) ⇌ CaO(s) + CO₂(g); Kp = 1.16
Calculate Kc
T= 800 °C = 1073 K; Δn= 1
Equilibrium concentration of CO₂
![K_{c} = [\text{CO}_{2}] = 1.233 \times 10^{-4}](https://tex.z-dn.net/?f=K_%7Bc%7D%20%3D%20%5B%5Ctext%7BCO%7D_%7B2%7D%5D%20%3D%201.233%20%5Ctimes%2010%5E%7B-4%7D)
Moles of CO₂ formed
Moles of CaCO₃ used up
Moles of CaCO₃ used up = moles of CO₂ formed = 6.155 × 10⁻⁴ mol
Mass of CaCO₃ used up
Moles of CaO formed
Moles of CaO formed = moles of CO₂ formed = 6.155 × 10⁻⁴ mol
Mass of CaO formed
Mass of solid at equilibrium
m = 10.0 g – 0.0616 g + 0.0345 g = 10.0 g
Answer:
the attractions between molecules shift the charges within molecules
