In the nucleus of an atom, there are 18 protons and 20 neutrons. What are the atomic number and mass number of this isotope?

Physics

2 answers:

Musya8 [376]3 years ago

8 0

Atomic number is 18 and mass number is 38.

Rina8888 [55]3 years ago

7 0

Answer:

Atomic number is 18. Mass number is 38.

Explanation:

<em>Atomic number</em> is the number of protons in the nucleus of an atom. It is represented with letter Z. So, for the given question atomic number is 18.

<em>Mass number </em>is the total number of neutrons and protons in the nucleus of an atom. It is represented with letter A.

So, for the given problem:

A=Z+neutrons

A=18+20

A=38

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