The type of a element is determined by the number of protons it carries. The element which have to protons is helium. An instance of the element with more electrons than protons, which makes it negatively charged, is called a anion or a negative ion. However, helium is one of, what are called, inert gases. The number of electrons in an inert gas is at the most stable number. It is quite hard to add or extract electrons from an inert gas. So without sounding absolute, He(-) is quite hard to come by.
Maybe lithium. Lithium's atomic number is 3 so the number of protons will be 3. It will lose an electron to attain noble gas configuration. So the no of electrons is 2. The Atomic Mass of lithium is 7 so the number of neutrons should be atomic mass minus the number of protons i.e 7-3=4. According to me it cannot have 2 neutrons.
If it has 2 protons, it has to be Helium. Helium atom has 2 electrons also, so if it has 3 electrons, it would be He^-
Li+ its an ion
2 protons, 2 electrons, and 1 neutron
Beryllium (Be) has 4 protons and 2 valence electrons.
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.
Helium has 2 protons, 2 neutrons and 2 electrons. The symbol for helium is He and the atomic number is 2.
Beryllium (Be) has 4 protons and 2 valence electrons.
Protons: 2 neutrons: 2 electrons: 2 Helium-3: 2 protons, 1 neutron, 2 electrons Helium-4: 2 protons, 2 neutrons, 2 electrons
2 protons, 2 electrons, and 1 neutron
Beryllium (Be) has 4 protons and 2 valence electrons.
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.
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)
Helium 2 protons 2 electrons
Helium has 2 protons, 2 neutrons and 2 electrons. The symbol for helium is He and the atomic number is 2.
Beryllium (Be) has 4 protons and 2 valence electrons.
Helium has 2 protons, 2 neutrons, and 2 electrons.
helium
Helium is a gaseous element at STP and has 2 protons, 2 electrons. He-3 isotope has 1 neutron whereas He-4 isotope has 2 neutrons.
He-4 isotope has 2 neutrons. He-3 isotope has 1 neutron