Answer:
v = 7.85 × 10¹⁴ Hz
Explanation:
The first three energy level can be represented as follows:
⇅ ------> n₄ = 4
⇅ ------> n₃ = 3
⇅ ------> n₂ = 0
ΔE = hv = 
ΔE = hv = 
ΔE = hv = 
ΔE = hv = 
where h = planck constant = 
J.s
mass (m) = 
e = 0.904 nm = 
hv =
hv = 
hv = 
hv = 
J
v = 
v = 
v = 
v = 7.85 × 10¹⁴ Hz (since s⁻¹ is equivalent to 1 Hz)
Thus, the frequency of an electronic transition from the highest-occupied orbital to the lowest-unoccupied orbital = 7.85 × 10¹⁴ Hz
The answer IS letter C. For magnesium to pair with chlorine and be neutral, magnesium must pair with two chlorines. Magnesium is in column 2 which means it has two valance electrons to "give away." If it gives away its two valance electrons, it becomes a +2 cation. Chlorine readily accepts only one electron, and when it does it becomes a -1 anion. So what does this mean? Well, Magnesium Chloride is made up of 1 Mg atom, and 2 Chlorine atoms because it forms a neutral compound. Mg gives 1 electron to each Cl atom forming a +2 -2 neutral compound. The Mg bares a +2 charge after giving its two valance electrons away, and each Cl bares a -1 charge after taking an electron. Hence +2 -2, which is neutral. This is why the formula is MgCl2.
Answer:
Converting Grams to Moles of an Element and Vice Versa.
We can convert back and forth between grams of an element and moles.
The conversion factor for this is the molar mass of the substance. The molar mass is the ratio giving the number of grams for each one mole of the substance
molar mass is the factor
I believe the answer you are looking for is TRUE!
Forgive me if I am incorrect, hope I helped you out!
Have a great day.
I think oc means 'original character' but it can be 'of course' as well
