All I need is these two questions. Please only answer if u know them. Thank you!

an atom  with  5 protons, 6 neutrons  and 5  electrons  has an atomic  mass of  11 amu

Explanation:

Atomic  mass is also referred  to  as mass number.

atomic  mass  is  equivalent to total number  of  protons  and neutrons.

An atoms  with 5  protons, 6  neutrons and 5 electron  has a atomic  mass  of 11 because the total number of  protons and neutrons =11

what's the

a) the particles of the chair are strongly held together.