Chemistry
Periodic Table
Elements and Compounds

# What is the atomic number of deuterium?

234 ###### 2008-07-25 06:26:20

Deuteriums emision spectrum either is like hydrogen http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch6/bohr.html or like http://en.wikipedia.org/wiki/Image:Deuterium_lamp_1.png

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## Related Questions As Deuterium and Tritium are both merely isotopes of Hydrogen and not elements in their own right, they both have an atomic number of 1, just like Hydrogen (Hydrogen-1). Deuterium (Hydrogen-2) has an atomic mass of 2, and Tritium (Hydrogen-3) has an atomic mass of 3. Having only one proton deuterium has the atomic number 1, as hydrogen; but because deuterium has also and a neutron, the atom is different compared to the atom of hydrogen. Consequently deuterium is an isotope of hydrogen with the atomic mass 2. If you think to the notation of an isotope, see an example with deuterium: 21H - where 2 is the mass number of deuterium and 1 is the atomic number. atomic mass of an atom = number of neutrons + number of protons For example the Deuterium isotope of Hydrogen Atomic mass number = 2 Atomic number = 1 The atomic number is the same as number of protons, so the Deuterium isotope has 1 proton atomic mass of an atom = number of neutrons + number of protons 2 = n + 1 n = 1 This is determined by the number of protons in a atom. e.g. carbon has an atomic number of 6 because it has 6 protons.Neutrons are irrelevant to atomic number. For instance:Hydrogen has 1 proton, NO neutrons and has atomic number 1, its isotope Deuterium has 1 proton, ONE neutron and also has atomic number 1. No.The atomic number is dependent on the number of protons. The atomic weight is dependent on the number of protons and neutrons. As almost every element has some neutrons in its nucleus the atomic number will never be equal to the atomic weight.The one possible exception is Hydrogen with a single proton. However there are two isotopes of hydrogen: deuterium and tritium. Deuterium has one proton and one neutron. Tritium has one proton and two neutrons. Therefore when taken as a whole the atomic weight of hydrogen will always be slightly greater than 1g/mole. Deuterium has 1 proton, and therefore an isotope of Hydrogen. Remember the number of protons is what changes the atomic number, and what element a atom is. When tritium and deuterium react under immense pressure and heat they form Helium (and omits a neutron) This is the most basic example of nuclear fusion. Deuterium, an isotope of hydrogen, has an atomic mass of 2 since it has a neutron as well as a proton in the nucleas. Hydrogen oxide, H20 is known as water - deuterium oxide is known as heavy water. Deuterium is an isotope of hydrogen, it has twice the mass of a hydrogen atom. A hydrogen atom's mass number is 1 so a deuterium atom would have a mass number of 2 Deuterium is written 4 H 1 I'm not sure how to type superscript and subscript but the top number is the atomic weight and the bottom # is the atomic number or the amount of protons Isotopes are those element which have same atomic numbers but different atomic masses. Example- Hydrogen has three isotopes, namely, protium, deuterium and tritium Isobars are those elements which have same atomic mass but different atomic number. Example- Calcium and Argon Atomic number of hydrogen is (always) 1. The mass number is 2, sum of number of protons (1 in H) and neutrons (1 in H in this case). This isotope of hydrogen is called deuterium.By the way: neurons (without t) is a very different thing! The atomic number indicates the number of protons in a given element. It also helps with calculating the weight number to determine if the material in question is an isotope or not (e.g. even though deuterium and tritium are basically isotopes of hydrogen, they may work differently and definitely weigh differently than plain ol' hydrogen). Isotopes of an element have the ssame number of protons (and therefore, atomic number), but different numbers of neutrons (and therefore, atomic masses). Isotopes are abbreviated by the atomic mass followed by the atomic symbol. Three isotopes of hydrogen exist: hydrogen, 1-H; deuterium, 2-H; and tritium, 3-H. Each of these isotopes has one proton (which gives them and atomic number of 1: hydrogen), and they have 0, 1, or 2 neutrons, respectively.

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