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This mass is 3.10e-23 g.
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Which two atoms will have their outer energy level filled with 2 electrons?
There are more than two such atoms. Perhaps there was a list of atoms you had to chose from. Anyway, two such atoms are beryllium and magnesium.
Does Be only have 4 electrons shared in BeCl2?
No. Beryllium has only two valence electrons and forms ionic bonds with chlorine, not covalent bonds. Beryllium atoms form 2+ ions, and chlorine atoms form 1- ions in order to form the ionic compound beryllium chloride, BeCl2.
Why do halides of Be polymerise?
Beryllium is covalent and polymeric. Each beryllium atom is bonded to four hydrogen atoms and each hydrogen atoms forms two bonds as it is bridiging two Be atoms. Since Be has two valence electrons and H only one, it is apparent that there are not enough electrons to form the usual electron pair bonds in which two electrons are shared between two atoms. Instead of this , three-center bonds are formed in which a 'banana-shaped' molecular orbital covers three atoms BE...H...Be, anc contains two electrons.The monomeric molecule BeH2, if formed with normal bonds, would have only four electrons in the outer shell of the beryllium atom and would be electron deficient. This would make the molecule very unstable; that is why BeH2 exists as polymer.
How many neutrons are in a neutral beryllium atom?
An element is defined as atoms with the same number of protons (and thus electrons). Beryllium has 4 protons and 4 electrons. The number of neutrons is determined by subtracting the atomic number from the atomic mass. At least three isotopes of Beryllium have been identified but there is only one stable naturally occurring isotope - Beryllium 9. If there are 4 protons, there must be 9 - 4 = 5 netrons in this isotope. The other stable isotope is beryllium 10 with a half life of 2,700,000 years and this must have 6 neutrons. This does not occur naturally but is made in atomic reactors. The other identified isotope is Beryllium - 8 which is made in the same way but immediately splits into two helium nuclei. So for most naturally occurring Beryllium, there are 5 Neutrons.
What two things make up matter?
Mass and atoms
What is the molar mass of beryllium chloride BeCl2?
BeCl2 One atom of beryllium and two atoms of chloride. = 79.912 grams/mole
Which two atoms will have their outer energy level filled with 2 electrons?
There are more than two such atoms. Perhaps there was a list of atoms you had to chose from. Anyway, two such atoms are beryllium and magnesium.
How many atoms are in an atom of beryllium?
Only two electron shells.
How many electrons are in beryllium transfer in atoms?
Only two electrons.
Which atoms will have their outer energy level filled with 2 electrons?
There are more than two such atoms. Perhaps there was a list of atoms you had to chose from. Anyway, two such atoms are beryllium and magnesium.
Does Be only have 4 electrons shared in BeCl2?
No. Beryllium has only two valence electrons and forms ionic bonds with chlorine, not covalent bonds. Beryllium atoms form 2+ ions, and chlorine atoms form 1- ions in order to form the ionic compound beryllium chloride, BeCl2.
How many electron valence does beryllium have?
The valence of beryllium is two.
The mass of any two atoms of the same element is always the same?
The masses of any two atoms of the same element are not always the same. Atomic mass (the mass you see on the periodic table) is just a weighted average of all of the weights of all of the different isotopes of an element.
What would be the charge of a beryllium atom that has a full outer shell?
Beryllium has 2 outer shell electrons. Its full electronic configuration is:- 1s2, 2s2
Why do halides of Be polymerise?
Beryllium is covalent and polymeric. Each beryllium atom is bonded to four hydrogen atoms and each hydrogen atoms forms two bonds as it is bridiging two Be atoms. Since Be has two valence electrons and H only one, it is apparent that there are not enough electrons to form the usual electron pair bonds in which two electrons are shared between two atoms. Instead of this , three-center bonds are formed in which a 'banana-shaped' molecular orbital covers three atoms BE...H...Be, anc contains two electrons.The monomeric molecule BeH2, if formed with normal bonds, would have only four electrons in the outer shell of the beryllium atom and would be electron deficient. This would make the molecule very unstable; that is why BeH2 exists as polymer.
Is the Mass of hydrogen atom is about the same as a proton?
Yes, in general. All hydrogen atoms contain one proton, most with no neutrons and all neutral atoms with one electron - and the electron has a much smaller mass. Some hydrogen atoms contain one (or, rarely, two) neutrons and so are heavier. But on average the atom has a mass much the same as a proton.
How many neutrons are in a neutral beryllium atom?
An element is defined as atoms with the same number of protons (and thus electrons). Beryllium has 4 protons and 4 electrons. The number of neutrons is determined by subtracting the atomic number from the atomic mass. At least three isotopes of Beryllium have been identified but there is only one stable naturally occurring isotope - Beryllium 9. If there are 4 protons, there must be 9 - 4 = 5 netrons in this isotope. The other stable isotope is beryllium 10 with a half life of 2,700,000 years and this must have 6 neutrons. This does not occur naturally but is made in atomic reactors. The other identified isotope is Beryllium - 8 which is made in the same way but immediately splits into two helium nuclei. So for most naturally occurring Beryllium, there are 5 Neutrons.
