1)-Un gramo de oro (Au), en forma cúbica (0,37 cm cada lado) puede ser estirado formando un alambre de 20 µm de diámetro (más delgado que un cabello) y 160 m de longitud. Además, un gramo de oro se puede estirar formando una lámina de 1 m2 y 70 nm de espesor. ¿Cómo se llaman estas propiedades?
⦁ Capacidad para formar hilos:
⦁ Capacidad para formar láminas:

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

it takes on an electronical energy

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock