If neutrons exert only attractive force, why don't we have a nucleus containing neutrons alone?

A neutron exerts a force on a proton which

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Lithium [At. no. =3, Mass no. = 7].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Carbon [At. no. 6, Mass no. = 12].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Silicon (At. no. 14, Mass no. = 28].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Sodium [At. no. 11, Mass no. 23].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Isotopes of hydrogen [""_(1)^(1)H,""_(1)^(2)H,""_(1)^(3)H]

Statement 1: When a beam of highly energetic neutrons is incident on a tungsten target, no X-rays will be produced. Statement 2: Neutrons do not exert any electrostatic force on electrons or nucleus of an atom.

Highly energetic electron are bombarded in a target of an element containing 30 neutrons Tne ratio of nucleus to that of Helium nucleus is (14)^(1//3) . Find (a) atomic number of the nucleus (b) the frequency of k_(a) line of the X- rays producted (R = 1.1 xx 10^(7) m^(-1) and c = 3 xx 10^(8)m//s)

Which of the following assertions are correct? (i) A neutron can decay to a proton only inside a nucleus (ii) A proton can change to a neutron only inside a nucleus (iii) An isolated neutron can change into a proton (iv) An isolated proton can change into a neutron

Why do stable nuclei never have more protons than neutrons ?