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
Answer:
The outer planets are also called the Jovian planets or gas giants. Like the inner planets, the outer planets have similar characteristics to one another. The outer planets are so much larger than the inner planets that they make up 99 percent of the mass of the celestial bodies that orbit the Sun
Explanation:
Answer: The main sections of an airplane include:
fuselage: The plane’s body, or fuselage, holds the aircraft together, with pilots sitting at the front of the fuselage, passengers and cargo in the back.
Wings: An aircraft’s wings are critical to flight through the production of lift, but they have many parts of the wing to control this lift amount and direction.
Cockpit: The cockpit is the area at the front of the fuselage from which a pilot operates the plane
Engine: The engine(s), or powerplant, of an aircraft creates thrust needed for the plane to fly.
Propeller: An aircraft’s propeller(s) are airfoils, similar to a wing, installed vertically to create thrust to drive the plane forward.
Tail assembly: An aircraft’s tail is mainly used for stability, as well as creating lift in combination with the wings. It’s comprised of several parts.
Landing gear: Landing gear is located under the belly of the plane consisting of a wheel and strut to soften impact with the ground and may be retractable into the fuselage.
Explanation:
Answer:
this is soloution of example ..
Answer:
Hyoid bone adapted for roaring or B.
Explanation:
Physiological basically means physical. So a physical adaptation would be B.