Get the information you need with the help of IDNLearn.com's extensive Q&A platform. Join our community to receive timely and reliable responses to your questions from knowledgeable professionals.

An atom of a certain element has 19 protons, 19 electrons, and a mass number of 39. This element is very reactive. How many neutrons are in this atom?



Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.


Sagot :

Answer:

There are 20 neutrons in this atom.  

Explanation: