The atomic and mass numbers for four different atoms are given below. which two are isotopes? atom atomic# mass# w 50 117 x 50 119 y 51 119 z 52 117

Express the following number in scientific notation. 0.026890 =

Which statement can best be concluded from the ideal gas law?

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.