HELP FAST GIVING BRAINLIEST!! All of the elements on the periodic table from #84 and up are...

1. Fake
2. Small
3. Light
4. Radioactive

Which of the following statements is true about planck’s law

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2