Astudent analyze two diagrams of a nitrogen atom. both diagram shows seven protons in the nucleus, but the number of neutrons differered. what are two nitrogen atoms? (a) electrons(b) isotopes(c) covalent bonds(d) ionic bonds

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Which one of the following substances would be the most soluble in ccl4? na2so4 h2o ch3ch2ch2ch2oh c4h10 hi