Question

Que:2
Fill in the blanks :----
1. The unit of atomic mass is ____
2. Symbol of element sodium is____
3. Neutron was discovered by____
4. Charge of electron are____
5. Mass of electron_____
are
0.2​

Answer 1

Answer:

regards Kumar and I will send you a b c d so I can insert the model to

Answer 2

Answer:

please follow me and make my answer as brainlist

Explanation:

1. a. m. u
2. Na
3. james chadwick
4. minus(-)
5. 9.1*10^-31