An element x is found to have a mass number of 31 and atomic number of 17. idenrify the group and the period to which it belongs?

How many atoms of oxygen are contained in 160 grams of n2o3

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Correct relationship between molecular formula and empirical formula