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Beryllium (Be) has 4 protons and 2 valence electrons.

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Heaven Wisoky

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Q: What element has 4 protons and 2 electrons?
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What element has 2 valence electrons and 4 protons?

Beryllium (Be) has 4 protons and 2 valence electrons.


What element has 4 protons a 4 neutrons?

berylium has 4 protons. It has 4 electrons too.


What element has 2 electrons 3 protons 4 Neutrons?

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


What element has 2 electrons 3 protons and 4 neutrons?

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


What element has four protons four electrons and five neutrons?

There are too many electrons. This would be a negative ion of lithium-6 (stable but less common isotope) that does not occur naturally. The element with 3 electrons, 3 protons, and *4 neutrons* is lithium-7, the most common isotope. It forms a stable positive ion (2 electrons).


How many protons neutrons electrons does berylluim have?

be is a s block metal element. It contains 4 protons and 4 electrons.


What has 4 protons and 2 electrons?

Beryllium (Be) has 4 protons and 2 valence electrons.


What element has 4 electrons 5 protons and 4 neutrons?

Be- Beryllium


How many electrons does an ion of beryllium have if it has a -2 charge?

Beryllium is element 4, so the "neutral" atom would have 4 protons and 4 electrons. In order to have a "-2" charge, it would need 6 electrons.


How many protons and electrons does the element Helium have?

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)


If the atomic number of an element is five how many protons does the element have?

Neutrons do not affect the neutrality (or charge) of an atom; protons and electrons do. In order to be neutral, the number of protons must be the same as the number of electrons.


Are there 2 neutrons in the helium 4 isotope?

No, there are actually 2 protons and 2 neutrons in the helium-4 isotope. The number of protons determines the element, while the sum of protons and neutrons gives the atomic mass of an isotope.