Sodium chloride or salt (NaCl) Soda ash (Na 2 CO 3) Baking soda (NaHCO 3) Sodium hydroxide or caustic soda (NaOH) Sodium nitrate or Chilean saltpeter (NaNO 3) Sodium Borate or borax (Na 2 B 4 O 7) Interesting facts: It is found free in nature. The ion (Na+) has one less electron so means it carries a positive charge of +1. For any element number of neutrons = mass number - atomic number = 23 - 11 = 12. Its commonest oxidation state is +1 (meaning that it 'donates' a single electron). One of which is its mass number the other is the number of protons. (keep in mind a neutral specie has equal no. Question. electrons are considered = 0 amu (very light compared to protons & neutrons) Atomic Number of sodium = 11 ===> 11 protons and 11 electrons. It will ignite spontaneously on water. On the periodic table each element has two numbers. He = 2 proton. it's simple.A neutral Na atom has, u know, 11 electrons & 11 protons, 12 neutrons.When there is Na ion, it means it loosed only 1 electron, i.e. of electrons or protons, e.g. protons and neutrons = 1 amu. Calculate the number of protons, neutrons and electrons it contains. Take the element, find its atomic number; that is the amount of protons. Soduim 22 = 22 amu ===> 22 - 11 = 11 neutrons Take the mass (if it is already given, use that) And subtract the atomic number (proton amount) from it, that is how many neutrons you have. e.g: H = 1 proton. The number of protons and neutrons in the nucleus remain the same as a normal sodium atom, but there is one less electron, altogether 10 electrons. of electrons & protons, while neutrons=at.mass - no. now it has 10 electrons instead of 11 or say as it has lost 1 -ve, so it gains 1 +ve charge. Generally the number towards the bottom of the atom is the proton number (atomic number). The atomic number of a sodium atom is 11 and its mass number is 23. It will float on water. A negative ION has more electrons than protons, a positive ION has less electrons that protons. 23Na is the stable isotope of sodium. Number of neutrons in sodium nucleus is 12. the proton number works in order. In its neutral state it has 11 protons and 12 neutrons, hence 11 electrons. It is abundant in the sun and other stars. Sodium-22 means the mass number (number of protons + neutrons) = 22.

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