Question

1. what is the symbol and atomic number of the element with the most protons according to this periodic table? click on its name to find out what year it was discovered.
2. which elements are liquids in room temperature?
3. reduce the temperature value to -200 degree celsius, using the control or typing “-200” (shown in which ones are the gases at that temperature? which ones are liquids?
4. a large value for thermal conductivity means that the element is a strong conductor of heat, whereas a small value means the element is a weak conductor. click on the term “conductivity, thermal” from the left tab. name two elements that are the strongest conductors of heat.

Explanation:

1. The element with the highest atomic number (most protons) as of now is Oganesson (Og) with atomic number 118. But without seeing the specific periodic - table in question, we assume the latest known element.
2. At room temperature (approximately 20 - 25°C), the elements that are liquids are Mercury (Hg) and Bromine (Br). Mercury is a metal and Bromine is a non - metal.
3. At - 200°C, many light gases like Hydrogen (H₂), Helium (He), Neon (Ne), Argon (Ar) remain gases. Liquids at this temperature would depend on the substances present, but substances like Oxygen (O₂) and Nitrogen (N₂) would be liquids at this cryogenic temperature.
4. Silver (Ag) and Copper (Cu) are two of the strongest conductors of heat among the elements.

Answer:

1. Og, 118
2. Hg, Br
3. Gases: H₂, He, Ne, Ar etc.; Liquids: O₂, N₂ etc.
4. Ag, Cu