En una molécula de cualquier sustancia existe es : * a) la unión de iones
b) la unión de átomos
c) la unión de electrones
d) la unión de protones
AYUD

Which is true about metals used for jewelry, such as platinum and gold? a. they have low flammability. b. they have low reactivity. c. they have high flammability. d. they have high reactivity.