Select the correct answer.
What does the sign represent with respect to electrons?
A.
opposite spin of two electrons
B.
different principal energy levels of two electron
C.
distance of two electrons from the nucleus
D.
attraction between two electrons

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

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.