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The isotope helium-3 has only one neutron. It has 1 neutron, 2 protons and 2 electrons. You can get an atom's number of neutrons by subtracting its atomic number from its mass (nucleon) number.

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Related Questions

What is the element which do not posses neutron in its nucleus?

There is an isotope of hydrogen called 'protium', which only has 1 proton and 1 electron, with no neutron.


What is an example of an atom without a neutron?

The only element that does not have a neutron in its nucleus is hydrogen-1, which consists of one proton and one electron.


CAN YOU HAVE AN element WITHOUT A NEUTRON?

yes, H-1 atom has no neutron


What element has 1 proton 1 neutron and 1 electron?

The element is hydrogen and the isotope is tritium (1H3)


Which element does not have any neutron in this atom?

Hydrogen is the only element without any neutrons.


How does Neutron emission from a nucleus affect an element?

Neutron emission from a nucleus can change the atomic mass of an element without affecting its atomic number. This can result in the formation of a different isotope of the element. Neutron emission can also make the nucleus more stable by reducing the neutron-to-proton ratio.


What element has 1 neutron and mass number of 2?

This is the isotope of hydrogen - deuterium.


What element has an mass number of 2 and 1 neutron?

This is the isotope of hydrogen - deuterium.


Where is the neutron on an element?

The neutron is found inside the nucleus of the atom.


What element does not have a neutron in the nucleus of a atom?

Hydrogen. In classical atomic theory, it contains only a proton.


What element has a neutron of 4?

Be


What is the only particle that can change in number for an isotope?

The Neutron- An element with the same number of protons and electrons, but with a different number of neutrons per atom than the original element is called an "isotope". An isotope will have, for all intensive purposes, about the same chemical and physical properties as the original element. Isotopes are written as the element, followed by a dash, then the number of neutrons in one atom of that isotope (Carbon-13 is an isotope of carbon with 13 neutrons per atom)