The atomic number of an element X is 14,and its relative atomic mass is 28. how many neutrons does an atom of X contain? what is the electronic distribution in an atom of X? will X react in an electro-valent or covalent manner? give reasons for your answer.
Bromine has two naturally occurring isotopes. One of them, bromine -79 has a mass of 78.9183 u and an abundance of 50.69%. What must be the mass and percent natural abundance of the other, bromine-81?