Answer: Option (A) is the correct answer.
Explanation:
Atomic number of sodium is 11 and its electronic configuration is 
.
In order to gain stability, sodium loses one electron and hence it forms a positive ion 
.
Thus, we can conclude that when sodium combines with chlorine, it has a net charge of +1 because sodium loses a negative electron when forming chemical bonds.
<span>The number of protons in every atom of an element determines the atomic number of an atom. Short after Rutherford made the gold foil experiment, the British scientist Henry Mosely discovered that the atoms of every element have a unique positive charge in their nuclei. This positive charge is the number of protons and is called atomic number. So, the atomic number identifies every different element.</span>
Answer:
History is the study of the past in all its forms. Philosophy of history examines the theoretical foundations of the practice, application, and social consequences of history and historiography. It is similar to other area studies – such as philosophy of science or philosophy of religion – in two respects.
Explanation:
