Answer:
Bro don't cheat in online exams bro
From our environment. I'm a vegan, so I get my food from plants, nuts, and grains. Other people might eat meat, so they get their food from plants and animals.
If this helps, can you mark me as brainliest please?
The answer is a. rubidium, because is located in the first group as well.
Answer:
2.21 x 10⁻⁷m⁻¹
Explanation:
Given parameters:
Energy of the photon = 9.02 x 10⁻¹⁹J
Unknown:
Wavelength of the photon = ?
Solution;
The wavelength and energy of a photon are related using the expression below;
E =
h is the Planck's constant = 6.63 x 10⁻⁴m²kg/s²
c is the speed of light
E is the energy
h c = E x wavelength
Wavelength =
=
Wavelength = 2.21 x 10⁻⁷m⁻¹