Question

I need help on either question you can answer. Thank you god bless

Answer 1

Further explanation

1.Atomic Number (Z) = Mass Number (A) - Number of Neutrons

neutrons = mass number-atomic number

Atomic mass Cl-37= 17

Mass number Cl-37=37

Neutrons = 37-17=20

2. Mass atom X = mass isotope 1 . % + mass isotope 2.%...

`\tt atomic~mass~X=0.0224* 88+0.7832* 90+0.1944* 91=90.1`

3. The energy in one photon can be formulated as

`\large{\boxed{\bold{E\:=\:h\:.\:f}}}`

f = c / λ, so :

`\tt E\approx f\approx (1)/(\lambda)`

Energy is directly proportional to frequency and inversely proportional to the wavelength

So, as the frequency of photon increases, the energy of photon increases

4. Based on answer number 3 :

A. The wavelength becomes longer, and the energy decreases