Neon (Ne), which has an atomic number of 10 is in Group 18 in the periodic table. To which group does nitrogen belong?
A Noble Gas
B Halogen
C alkalai metals
D alkalai earth metals

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

An observation that requires measurement is called quantitative observable or qualitative