All hydrogen atoms contain 1 proton each. The mass number of an isotope is defined as the sum of the numbers of protons and neutrons [note correct spelling] in a nucleus of an atom of the isotope. Therefore, hydrogen with 2 neutrons has a mass number of (1 + 2) or 3.
There is not enough information to answer this, as we also need to know the number of protons. The mass number is the sum of the number of protons and neutrons in the nucleus. As it turns out, there are three isotopes that have two neutrons. Hydrogen-3, Helium-4, and Lithium-5 with masses of 3,4, and 5 respectively. Of these, only Helium-4 is common and stable. Lithium-5 is extremely unstable and almost never observed.
Hydrogen is a non metal element. Mass number of it is 1.
The mass number of the hydrogen isotope with 2 neutrons is 3 because of the proton that is also present in the nucleus.
Atomic number of hydrogen = 1 (always)Mass number = Number of protons + Number of neutrons = 1 + 2 = 3
3
The number of neutrons in an atom depends on the isotope. The most common sulfur isotope has 16. The average number of neutrons in an atom of sulfur is about 32.065.
Silicon has 14 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a silicon isotope = Mass number - 14
For each isotope of bohrium the number of neutrons is different. Number of neutrons = Mass number of an isotope of Bh – 107
It is called an isotope.
Meitnerium has 109 protons and electrons.For each isotope of Mt the number of neutrons is different. Number of neutrons = Mass number of an Mt isotope - 109
The number of neutrons in hydrogen depends on the isotope. Protium,deuteriumand tritium have 0, 1 and 2 neutrons respectively.
Atoms of all elements can have neutrons in them. Only the element hydrogen has an isotope whose atoms do not contain neutrons, but all other isotopes of hydrogen have neutrons in them. In the heavier elements the number of neutrons always exceeds the number of protons in the atom.
The atom of promethium contain 61 protons and electrons.For each isotope the number of neutrons is different. Number of neutrons = Mass number of an isotope - 61
There is one proton, one electron in hydrogen. The number of neutrons depends on the isotope of hydrogen. Hydrogen has three isotopes: protium, deuterium and tritium with 0, 1 and 2 neutrons respectively.
Elements are substances such as Hydrogen. It has 1 Proton, and 0-2 neutrons. Since the number of neutrons can vary, we call each form of Hydrogen an isotope. A hydrogen with no neutrons and a hydrogen with 1 nuetron are both still Hydrogens. We simply call one the Hydrogen-1 Isotope. An isotope is just a variation of an element as the element can have different numbers of neutrons. All isotopes of an element have the same number of protons, else itd be an isotope of another element.
Deuterium is an isotope of hydrogen with 1 proton and 2 neutrons for a combined mass number of 3.
The nucleus of fermium contain 100 protons.For each isotope the number of neutrons is different.Number of neutrons = Mass number of an isotope - 100
The atom of promethium contain 61 protons and electrons.For each isotope the number of neutrons is different. Number of neutrons = Mass number of an isotope - 61
Hydrogen does not have any neutrons unless it is the isotope deuterium ( 1 neutron) or tritium (2 neutrons)
The atomic nucleus of technetium contain 43 protons and electrons.For each isotope the number of neutrons is different. Number of neutrons = Mass number of an Tc isotope - 43
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 number of neutrons is different for each isotope.