Question: The question is incomplete. The spectrum was not added to the question. Find attached of the spectrum
Answer:
(A)
(i) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
(ii) Calcium
(B) Wavelength = 2.03*10^-7 m
Explanation:
A)
(i) from the spectrum, the electron configuration can be written as;
1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
(ii) from the electron configuration, the element has 20 number of electron.
Therefore, the element is calcium.
(b)Calculating the wavelength using he formula;
λ = h*c/ΔE
where;
h = 6.626*10^-34
c = 3*10^8
ΔE = 0.980*10^-18
Substituting , we have;
λ = h*c/ΔE
= (6.626*10^-34 * 3*10^8)/ 0.980*10^-18
= 1.9878*10^-25/0.980*10^-18
= 2.03*10^-7 m
When trying to step into an argument or misunderstanding between people as a <em>bystander with drugs and alcohol involved</em>, the direct approach won't work.
- When trying to make peace between quarelling individuals as a bystander, the direct approach would <em>fail if alcohol or drugs is being held</em> as the prsin might see you as a villian.
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Therefore, the direct approach won't work in the this scenario.
Learn more :brainly.com/question/25170371
The answer is B, Let me know if you get it right!
Answer:
light
According to Newtonian gravity, light is not affected by gravity, as light is massless. Einstein's law E = mc 2, immediately suggests that light is affected by gravity. This is indeed the case and has experimentally be observed via gravitational lensing and other effects.
Explanation:
I thought I'd just answer here as well so I can get a couple extra points :)
I'm super glad I helped <3
2.3 mols of Al*26.98 molar mass of Al=62.054g
