Answer:
The correct answer is option A.
Explanation:
Energy of the photon of an electromagnetic radiation is give by Planck's equation:

Where:
h = Planck's constant
c = speed of light
= Wavelength of the photon's radiation
Energy of photon of 800 nm monochromatic light


Energy per mole of photons:
..[1]
Energy of photon of 400 nm monochromatic light

Energy per mole of photons:
..[2]
[1] ÷ [2]



The answer to the first one is C. Strong attraction between ions
The answer to the second one is A. High melting points
Hope this helps :)
Answer : The correct option is, (C) Both the atomic mass and the atomic number increase from left to right.
Explanation :
The general trend of atomic number and atomic mass in the periodic table is,
Both atomic number and atomic mass increase from left to right and decreases from right to left in the periodic table due to the addition of the number of neutrons and the number of protons in the nucleus.
Hence, the correct option is, (C) Both the atomic mass and the atomic number increase from left to right.
“telophase” because it’s the only step that actually involves the cell to physically split, and it also involves the forming of a nuclear membrane
Hope this helps :)