How to start of my science introduction about the history of matter?

What element has the least metallic character B, C, F, Li or Na?

Which word identifies a large natural or human-made lake used to supply water? marsh pond reservoir wetland

Which of these is given away or accepted by an atom when it reacts with other atoms? Electron, neutron, nucleus, or proton

What is the accepted name for the compound N2O5

Which group of molecules have c h and o in the ratio of 1 2 1?

What happens to the equilibrium if the pressure is increased?

Which of the following colors of visible light has the lowest energy? A) blue B) green C) red D) yellow

All are true about how does gravity aid erosion except? Gravity causes rocks to fall and break apart. Gravity causes rocks to get larger then breaks it apart. Gravity pulls rainwater down eroding rocks.

Determine the empirical formula of the following compound: A 0.4987-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.9267 g of carbon dioxide and 0.1897 g of water.

How many moles of NH3 from when 32.4 L of H2 gas completely reacts at STP according to the following reaction? Remember 1 mol of an ideal gas has a volume of 22.4 L at STP N₂ (g) + 3H₂ (g) →2NH₃ (g) ps: We have to not only give the answer which is 1.