Which atom has the largest atomic radis

1.potassium
2.iron
3.arsenic
4.bromine

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

Which of the following units is not an official si unit? mole liter kilogram ampere

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust