The substance nitrogen has the following properties: normal melting point: 63.20 K normal boiling point: 77.40 K triple point: 0.127 atm, 63.10 K critical point: 33.5 atm, 126 K At temperatures above 126 K and pressures above 33.5 atm, N2 is a . N2 does not exist as a liquid at pressures below atm. N2 is a at 1.35 atm and 55.8 K. N2 is a at 0.127 atm and 84.7 K. N2 is a at 1.00 atm and 70.4 K.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

answerleaving cheese out to get moldy;

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.