3. write the nuclear symbol and hyphen notation
for each of the following isotopes:
a. mass number of 28 and atomic number of 14
b. 26 protons and 30 neutrons

a. ²⁸₁₄Si, Silicon-28

b. ⁵⁶₂₆Fe, Iron-56

Explanation:

a. For the nuclear symbol, the mass number of the isotope is on top while the atomic number is at the bottom. For example, ²⁸₁₄Si. The hypen notation for the isotope is Silicon-28 based on the atomic number and mass number.

b. The mass number of the isotope is equal to the sum of protons and neutrons = 26+30 = 56. The atomic number is the number of protons = 26. Thus, the nuclear symbol is ⁵⁶₂₆Fe and the hypen notation is Iron-56.

its first and third is your answer i did the qustion the fourth isnt right

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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