Question

The atom of an element is made up of 5 protons, 7 neutrons and 5 electrons. What is its atomic number and mass number? ​

Answer 1

$\sf\huge\green{Given:-}$

$\sf\leadsto Protons =4$

$\sf\leadsto Neutrons =5$

$\sf\leadsto Electron = 4$

$\sf\huge\green{Find:-}$

• $\sf\leadsto What \: is \: its \: atomic \: number \: and \: \: mass \: number?$

$\sf\huge\green{Solution:-}$

Added protons, neutron and electron,

$\sf\rightarrow \:Mass number= 4 + 5$

$\sf\dashrightarrow \fbox \red{9}$