The chemical symbol for sodium is Na
Answer:
The answer is

Explanation:
The frequency of the photon can be found by using the formula

where
E is the energy
f is the frequency
h is the Planck's constant which is
6.626 × 10-³⁴ Js
From the question
E = 2.50 × 10^-18 J
So we have

We have the final answer as

Hope this helps you
Answer:
angle
Explanation:
let us see the sun moves an a angle
<h3>0.020 × 1000 × 100</h3>
<h2>= 2000 mg of Sn</h2>
hope that helps !
Answer: Hydrogen and helium
Explanation: