Give the chemical symbol of an element in the third period (row) of the periodic table with four 3p electrons.

Scientist wants to react a barium chloride salt with an acid. to speed up the reaction, the scientist crushes the barium chloride salt until it is a fine powder. this speeds up the reaction by a. increasing the ph of the salt. b. increasing the surface area of the salt. c. increasing the pressure of the salt. d. increasing the temperature of the salt. im thinking more a not 100% sure

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Chromosome 17 is made of over million base pairs.