Periodic table-atomic number puzzle

Here are 2 sets of puzzles some have hints and clues others are more traditional.
Students can either use their knowledge of the periodic table and atomic numbers or have a physical copy to refer to. They identify the words by looking up the atomic number and replacing that with the letter or letters to find the hidden word which they then circle or place in the correct position.
I think I’ve got it right but feel free to change any errors.