Sasha brings the saran wrap close to the electroscope. Since your electroscope has a negative charge, determine the charge of the saran wrap based on the behavior of the foil leaves.

Ireally don’t know

Molybdeum(mo)orruthenium (ru)actually, elements with similar chemical properties as technetium would bemn, re, and bh. this is because elements in the same group/family (column) have similar chemical properties. elements in the same period (row) have the same number of energy levels (or shells).

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Answer sample (c); // would be best because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest;