The wavelength of a photon that has an energy of E = 3.69×10−19 J is 5.42 x 10⁻⁷ m.
<h3>What do you mean by wavelength?</h3>
The space between corresponding points (adjacent crests) in adjacent cycles is known as the wavelength () of a waveform signal that is sent in space or down a wire.
The wavelength can be calculated by the given formula
E = hc/λ
Where, E is energy = 3.65 x 10⁻¹⁹ J
h is plank's constant = 6.626 x 10⁻³⁴ J.sec
c is speed of light = 2.9 × 10⁸ m/s
Putting the values in the formula
λ = (6.626 x 10⁻³⁴)(2.9 × 10⁸) / (3.65 x 10⁻¹⁹) = 5.42 x 10⁻⁷ m.
Thus, the wavelength, λ is 5.42 x 10⁻⁷ m.
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Since this element has 50 electrons you know that it has 50 protons. The number of proton= the atomic number. Atomic number 50 is tin. The atomic symbol for tin is Sn and the weight is 120. So this is the tin 120 isotope
The name is Aluminum Cloride
Answer:
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Explanation:
<span>In a sample of solid Ba(NO3)2 the ratio of barium ions to nitrate ions is would be one is to 2 or 1:2. Barium ion has a formal charge of positive two which means that it needs two ions which has a formal charge of negative one or 1 ion with the formal charge of negative two. However, for this case, it is bonded to a nitrate ion which has a formal charge of negative one. Therefore, it needs two nitrate ions so that for every 1 atom of barium ion, we need two ions of nitrate ions.</span>
