Chechnya. 345. Gcbjshjkfs
207 is the mass number. 82 would be the atomic number
The atomic number increases moving left to right across a period and subsequently so does the effective nuclear charge. Therefore, moving left to right across a period the nucleus has a greater pull on the outer electrons and the atomic radii decreases.
30.07 g/mol (that’s grams per mole)
Answer: i believe it is
602,000,000,000,000,000,000,000 atoms
Explanation:
6.02×1023 atoms/mole
