LETTER BOXES

Resolve the anagram and enter your solution downwards into the bold boxes. The last letter of each answer (including the anagram answer) begins the next one.

CLUES: 1 Examination 2 Poisonous 3 Silicon wafer in a PC 4 French chemist, Louis 5 Colour of litmus paper when dipped in acid 6 Water down 7 Protein and catalyst 8 Brilliant physicist, Albert 9 Isaac who discovered gravity 10 Nuclear weapon, _ _ _ _ _ _ _ bomb