Login
Home
TOP
Send feedback
Login
Subjects
Science Test Space
Class 10
Atoms and Molecules
Introduction to atom and its mass
9.
Atoms and molecules: Choose the correct answer
Question:
2
m.
1
.
The mass number of \(Si-28\) is \(28\) and number of neutrons is \(14\), then the number of protons is
\(28\)
\(15\)
\(29\)
\(14\)
2
.
The formula \(E=mc^2\) is used to convert atom's
mole into energy
mass into density.
mass into energy.
mass into mole.
Login
or
Fast registration
Previous task
Exit to the topic
Next task
Send feedback
Did you find an error?
Send it to us!