Explain why the 4s sublevel fills before the 3d sublevel begins to fill as electrons are added

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize