Answer: B
Explanation: La respuesta es b porque su electricidad y no es un ácido.
Answer:
infrared waves are longer than gamma rays
Explanation:
according to the order :
radio, microwaves, infrared, light, ultraviolet, X-ray, gamma rays
radio waves have the highest wavelenght and lowest frequency, gamma rays have the highest frequency and lowest wavelength.
Number of neutrons = mass number - atomic number = 40 - 19 = 21 answer
