Drawing conclusions list the earth names for the 30 alien elements in order of atomic number

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

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.