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. now it has 10 electrons instead of 11 or say as it has lost 1 -ve, so it gains 1 +ve charge. On the periodic table each element has two numbers. The ion (Na+) has one less electron so means it carries a positive charge of +1. 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. protons and neutrons = 1 amu. A negative ION has more electrons than protons, a positive ION has less electrons that protons. Take the element, find its atomic number; that is the amount of protons. Sodium-22 means the mass number (number of protons + neutrons) = 22. The atomic number of a sodium atom is 11 and its mass number is 23. e.g: H = 1 proton. Generally the number towards the bottom of the atom is the proton number (atomic number). electrons are considered = 0 amu (very light compared to protons & neutrons) Atomic Number of sodium = 11 ===> 11 protons and 11 electrons. In its neutral state it has 11 protons and 12 neutrons, hence 11 electrons. One of which is its mass number the other is the number of protons. the proton number works in order. 23Na is the stable isotope of sodium. He = 2 proton. Its commonest oxidation state is +1 (meaning that it 'donates' a single electron). 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. It will float on water. of electrons or protons, e.g. For any element number of neutrons = mass number - atomic number = 23 - 11 = 12. It will ignite spontaneously on water. Number of neutrons in sodium nucleus is 12. 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. Soduim 22 = 22 amu ===> 22 - 11 = 11 neutrons of electrons & protons, while neutrons=at.mass - no. Question. It is abundant in the sun and other stars. (keep in mind a neutral specie has equal no. Calculate the number of protons, neutrons and electrons it contains.

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