Điện tích hạt nhân của nguyên tử nitơ là 7+. Số electron lớp ngoài cùng của nguyên tử nitơ là A. 2 electron B. 3 electron C. 4 electron D. 5 electron

Calculate the molarity of each of the following solutions. part a) 0.12 mol of lino3 in 5.5 l of solution part b) 60.7 g c2h6o in 2.48 l of solution part c) 14.2 mg ki in 100 ml of solution

Draw the structure for 5-isopropyl-2-methyl-3-nonene

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?