What's the lewis structure for CF2H2

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

What type of electromagnetic radiation has a shorter wavelength than blue light

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.