Short Answer 
To find combinations of atomic numbers that sum to 200, first understand that the atomic number represents the number of protons in an element. By selecting elements like Mercury (80), Silver (47), and Copper (29), and experimenting with different combinations, you can calculate their totals and check for the sum of 200.
Step 1: Understanding Atomic Numbers
The atomic number of an element indicates the number of protons in its nucleus, and each chemical element has a unique atomic number. This is crucial for identifying elements and their properties. For this task, we need to find combinations of these numbers that add up to 200.
Step 2: Selecting Element Combinations
To find suitable combinations that sum to 200, we can explore various elements. Begin by listing out some elements with known atomic numbers and testing their sums. For example, consider the following elements:
- Mercury (Hg) – Atomic Number 80
- Silver (Ag) – Atomic Number 47
- Copper (Cu) – Atomic Number 29
- Tungsten (W) – Atomic Number 74
Step 3: Calculating the Total
Once the elements are chosen, add their atomic numbers together to check if they total 200. An example combination is:
- 80 (Hg) + 47 (Ag) + 29 (Cu) = 156
- 156 + 44 (W) = 200
Continue to experiment with different combinations of atomic numbers until you reach the desired total of 200.