Atomic number is called the number written to the left of a chemical symbol or formula
Answer:
They are listed below
Explanation:
The 5 things that the periodic table includes are;
1. Name of the element
2. The symbol of the element
3. Atomic number of the element
4. Relative atomic mass
5. Electron configuration
The best design for this experiment is to number the items from 1 to 1,200 and then choose random numbers in the table of random digits (second option).
<h3>How to use a table of random digits?</h3>
These tables are used to randomly assign items or subjects into groups when experimenting. The best way to use these tables are:
- Give each item or participant a number.
- Take a lot at the table and choose a number.
- If this number is the same that the number assigned to an item or participant classify it in the first group.
- Keep selecting.
Based on this, for this experiment the steps are:
- Number the items from 1 to 1,200.
- Identify numvers in the table.
- Assign the first 400 items to the process 1 group.
- Repeat the process for the other two groups.
Learn more about experiments in: brainly.com/question/11256472
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Answer:
Explanation:
From the given information:
The energy of photons can be determined by using the formula:
where;
planck's constant (h) =
speed oflight (c) =
wavelength λ = 58.4 nm
To convert the energy of photon to (eV), we have:
Hence
E = 21.2 eV
b)
The equation that illustrates the process relating to the first ionization is:
c)
The 1st ionization energy (I.E) of Hg can be calculated as follows:
Recall that:
I.E = Initial energy - Kinetic Energy
I₁ (eV) = 21.2 eV - 10.75 eV
I₁ (eV) = 10.45 eV
Since ;
∴
Hence; the 1st ionization energy of Hg atom =
Finally;