Question

What is the total number of electrons in an atom of an element with an atomic number 19 and mass number of 40?

Answer 1

Answer:

92

Explanation:

t.ay gvjfv23 jghnnhenumber choosen 49 then your answer is 92

Answer 2

Answer:-

• Number of protons =atomic number =19

We know that

Number of Electrons =Number of protons

$\\ \sf\longmapsto Number\:of\:electrons=19$

Notes:-

• Atomic number is the number of protons in a atom .
• It is denoted by Z
• Mass number is the sum of neutrons and protons in a atom .
• It is denoted by A.