Question

First: Identify the element from clue 16 ---- Period 6, Group 1. hint number 55 on the table(Name and Atomic number, please 2 points) Second: you must "cross a divide". When you land back on "solid ground" there is a silvery white metal with an average mass of 178.5 amu. From there --- add 7 protons! Identify the element and describe the final steps you used to solve this last clue! (4 points)

Answer 1

For the first part of your request:

1. The element located in Period 6, Group 1 is **Francium**, with an atomic number of **87**.

Now for the second part:

2. The clue refers to "crossing a divide" and landing back on "solid ground." The hint suggests moving to the next element in the periodic table, which may refer to an element that is a solid at room temperature and has silvery-white properties.

If we consider a common silvery-white metal with an average atomic mass of 178.5 amu, that would point to **Tantalum (Ta)**, which has the atomic number **73**.

3. Now, carrying out the instruction to "add 7 protons" to Tantalum (Ta):

- Tantalum has an atomic number of 73.
- Adding 7 protons gives us **80**.

4. The element with atomic number 80 is **Mercury (Hg)**.

To summarize the final steps for this part:
- I identified Tantalum (73) based on the clues provided regarding the properties of a silvery-white metal with an average mass.
- I then added 7 to its atomic number (73 + 7 = 80) to find Mercury (Hg).

**Final Answers:**
1. Francium (87)
2. Mercury (Hg, 80)