group 1...is 1 valence.
group 2...is 2 valence.
Gallium is a mono-atomic metal element. So their atoms are atoms, and as many as you have!
8 valence electrons
Hydrogen has 1 valence electron, whereas helium has 2 valence electrons.
Valence electrons are the electrons present in the outermost shell of an atom.You can easily determine the number of valence electrons an atom can have by looking at its Group in the periodic table.For example, atoms in Groups 1 and 2 have 1 and 2 valence electrons, respectively.Atoms in Groups 13 and 18 have 3 and 8 valence electrons, respectively.
H2O2 is a compound, and the concept of "valence electrons" applies to atoms but not to compounds. If the question is or should be intended to be, "How many valence electrons did the atoms in one formula unit of H2O2 have before they reacted to form the compound?", the answer is one from each hydrogen atoms and six from each oxygen atom, for a total of 14.
Oxygen atoms have 6 valence electrons, while sulfur atoms have 6 valence electrons as well.
Oxygen has six valence electrons.
Gallium is a mono-atomic metal element. So their atoms are atoms, and as many as you have!
Aluminum has 3 valence electrons.
8 valence electrons
3
Four.
carbon has 4 valence electrons and can form a maximum 4 bonds with other atoms.
The number of valence electrons in an atom determines its ability to form ions. Atoms that have few valence electrons tend to lose them to form positive ions, while atoms with many valence electrons tend to gain electrons to form negative ions. The ionic charge of an ion is related to the number of electrons gained or lost during the formation of the ion.
Hydrogen has 1 valence electron, whereas helium has 2 valence electrons.
Serine has five valence electrons. It has three valence electrons from the oxygen atom and one valence electron each from the carbon and nitrogen atoms in its structure.
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