Which of these conditions most likely produces an unstable isotope?

equal numbers of protons and neutrons in a small nucleus

equal numbers of protons and neutrons in a large nucleus

more neutrons than protons in a nucleus

more electrons than protons in an atom

What forms when chemical reactions combine pollution with sunlight?

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.

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers