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The nunmber of electrons present (or missing) from an atom (ion) affects other atoms' ability to merge with other atoms that might have complementary arrangemensts of electrons in their atoms. We call these valence electrons, and they basically control the relationship of atoms, by allowing the"sharing" of the outtermost shell's electrons between atoms.
Take the simple water molecule, for instance. It has one oxygen atom and two hydrogen atoms. The two hydrogen atoms are balanced becauase of the one electron and one proton, but the K shell can hold 2 electrons so the hydrogen atom has a valence of -1.
Looking at the oxygen atom, now, we see it is also balances, because there are eight protons and eighth electrons. It has a valance of 2 because the L shell is not full with with only six of its eight electrons. (2 in the K shell, 6 in the L shell.)
This sets up the natual combination of two hydrogen atoms with one oxygen atom, The Hydrogen shares its valence electron with one of the two from the oxygen, while the other hydrogrem atom shares its electron with the other valence electron on the other oxygen. This is water.
Wiki User
∙ 12y ago
Wiki User
∙ 16y agothe number of electrons in an element is the same number of its protons...like on the table of elements, hydrogen has the number 1 on its square...that means that hydrogen has 1 proton and 1 electron.
Wiki User
∙ 12y agoThe number of electrons in an orbit depends on the element. Hydrogen has 1, Helium has 2. Lithium has 2 in the inner orbit and 1 in the outer one.
Only a maximum of two electrons can occupy an orbital.
The orbital configuration of oxygen:
1s2 2s2 2px2 2py1 2pz1
The s orbital and the 2px orbitals have 2 electrons but the py and pz orbitals have 1 each.
Wiki User
∙ 15y agoOuter shell electrons are called valence electrons. The # of valence electrons depends on the group that the atom is in.
Wiki User
∙ 13y agoThe number of electrons is equal to the number of protons in an atom
Wiki User
∙ 14y agoThey equal to the number of protons
Wiki User
∙ 15y ago2,8,18,32,50
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How does the oxidation number indicate if an electron will be lost or gained?
If an atom loses electron, then it will have a positive oxidation number. If an atom gains electron, then it will have a negative oxidation number.
What is the electron configuration of atomic number 26?
The electron configuration of iron, atomic number 26, is [Ar]3d64s2. The expanded electron configuration is 1s22s22p63s23p63d64s2.
What does the third quantum number of an electron give?
The Specific orbital the electron is in
What information does the third quantum number of electron give?
The specific orbital the electron is in
What information does the first quantum number of an electron give?
The energy level the electron is in
How does the oxidation number indicate if an electron will be lost or gained?
If an atom loses electron, then it will have a positive oxidation number. If an atom gains electron, then it will have a negative oxidation number.
What is an electron's atomic mass number?
The electron has no atomic mass number. The mass of an electron is roughly 1/1800 of the mass of a proton or neutron.
What is a quantum number?
Four quantum numbers are used to describe electrons. The principle quantum number is the energy level of an electron. The angular momentum number is the shape of the orbital holding the electron. The magnetic quantum number is the position of an orbital holding an electron. The spin quantum number is the spin of an electron.
What is the electron configuration of atomic number 26?
The electron configuration of iron, atomic number 26, is [Ar]3d64s2. The expanded electron configuration is 1s22s22p63s23p63d64s2.
What does the third quantum number of an electron give?
The Specific orbital the electron is in
What information does the third quantum number of electron give?
The specific orbital the electron is in
What information does the first quantum number of an electron give?
The energy level the electron is in
An electron dot diagram shows an atoms number of?
Electron dot formula tells the number of valence electrons
Mass number of an electron?
The mass number of an electron is 5.485 799 095 x 10-4 amu.
What number tells you the number of valence electron?
group number
Can the oxidation number of an element change?
Yes, it can. When the element loses electron, the oxidation number increases and when it gains electron, the oxidation number decreases.
What do you to find a electron of an isotope?
subtract the number of protons from the number of electrons. The above answer does not answer the question!!
