State the difference between sodium atom and sodium ion.

1. Sodium Atom: A sodium atom is a neutral particle that has 11 protons and 11 electrons. The number of protons and electrons are equal, making the overall charge of the atom neutral.

2. Sodium Ion: A sodium ion (Na+) is formed when a sodium atom loses an electron. Therefore, a sodium ion has 11 protons and 10 electrons. The loss of an electron gives the sodium ion a positive charge.

So, the main difference between a sodium atom and a sodium ion lies in their electron configuration and overall charge. A sodium atom is neutral and has equal numbers of protons and electrons, while a sodium ion carries a positive charge due to the loss of an electron.