There is no such element: an element is neutral, so it has equal numbers of protons and electrons.
Impossible:
2 protons 4 neutrons and 3 electrons is the IMpossible He-1 isotope with mass number 6 (=2p+4n). Helium does not accept electrons because it is noble.
Possible:
2 protons 4 neutrons and 2 electrons is (elemental) Helium, isotope with mass number 6 (=2p+4n)
3 protons 4 neutrons and 3 electrons is (elemental) Lithium
The ion with 52 protons, 76 neutrons, and 54 electrons is the ion of element tellurium (Te) with a charge of +2. The number of protons determines the element, the number of neutrons can vary in isotopes, and the number of electrons determines the charge of the ion.
protrons=2 electrons=2 neutrons=2
No element could possibly fit this description. There are WAY too many electrons and no where near 201 particles in the nucleus.
Copper has an atomic number of 29 - so it has 29 protons-- when it has only 27 electrons so it is Cu2+ . The isotope is copper-64
I don't want to do your homework for you. Here's how you figure it out: Protons = atomic number Neutrons = atomic mass - atomic number Electrons = atomic number + ionization
helium
Helium has 2 protons, 2 neutrons, and 2 electrons.
helium
It is normal for the isotope of the element helium. 2He4 isotope has 2 protons, 2 neutrons and 2 electrons.
There is no such element: an element is neutral, so it has equal numbers of protons and electrons.Impossible:2 protons 4 neutrons and 3 electrons is the IMpossible He-1 isotope with mass number 6 (=2p+4n). Helium does not accept electrons because it is noble.Possible:2 protons 4 neutrons and 2 electrons is (elemental) Helium, isotope with mass number 6 (=2p+4n)3 protons 4 neutrons and 3 electrons is (elemental) Lithium
One atom of helium contains 2 protons and 2 electrons. The most abundant isotope of helium, helium-4, has 2 neutrons. The other, rare isotope of helium, helium-3, has 1 neutron. (Source: Wikipedia)
1) it's spelt Calcium and 2) 20 protons, 20 electrons, 20 neutrons
Magnesium2+ because it donated 2 electrons
Helium has two protons, since its atomic number is two. It is an inert element so it also has two electrons. The number of neutrons depends entirely on the isotope. The most common and stable isotope of Helium has 2 neutrons.
2 protons 2 electrons 2 neutrons 2 protons 2 electrons 2 neutrons don't know
A helium atom has 2 protons, 2 neutrons, and 2 electrons.
There are particular isotopes that have similar number of electrons and neutrons. Some of these isotopes include hydrogen-2, helium-4, carbon-12 and nitrogen-14.