kelseynicole531 kelseynicole531

24-03-2018
Chemistry

contestada

in the symbol 42He, the subscript 2 is the _ for helium and the superscript 4 is the _ for helium.

Respuesta :

stacihewitsonp62pok stacihewitsonp62pok

24-03-2018

The subscript 2 is the atomic number. This tells you the number of protons in the atom. The superscript 4 is the mass number. This tells you the protons + neurons

Answer Link

Otras preguntas

what is the meaning of market in economics

Simplify completely:

explain how you could separe a mixture of sand and salt

What is the declaration of independence?

what did the invention of the cotton gin increase

what is the sum of 2/10 and 20/100

What were the goals of the free soil party

In Countries Where Businesses Are Government Owned?

Did the founding fathers wear wigs?

In Old Yeller: When does Mrs. Coates first demonstrate that she recognizes Travis is taking on his father's role?