PDF chapter test TRY NOW
Choose a suitable word to fill in the blanks in the following statements.
1. The element with the smallest size in the \(4\)th period is _________.
2. If this is Dobereiner's triad and Cl and I have atomic masses of \(35.5\) and \(127\), respectively, Br has an atomic mass of __________.
Register for free to see more content