An element X has 127 neutrons and 82 electrons.
It...
An element X has 127 neutrons and 82 electrons.
Its atomic number is?
209
105
45
82
Correct answer is D
An atom that has equal number of protons and electrons is called a neutral atom.
With 82 electrons, the atomic number is also 82
22688Ra → x86Rn + α - particle What is the value of x in the nuclear reaction above?...
What is the atomic number of Neodymium? ...
Potassium tetraoxomanganate (VII) is often added to impure water to? ...
Consider the following exothermic reaction 2SO2(g)+O2(g)=2SO3(g) . If the temperatu...
Which of the following oxides is basic? ...
What is the relative molecular mass of a compound which has empirical formula CH2O? [C...