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10The outermost shell of an atom is called the valence shell.
Atoms always try to attain stability with 2 or 8 electrons in their valence shell.
Atoms with 4 valence electrons generally lose electrons to attain stability.
An element with 8 valence electrons has valency 0.
Valency is the number of electrons gained, lost, or shared by an atom.
Lithium gains one electron to attain stability.
In the crisscross method, the valency numbers are exchanged to write molecular formulas.
In water (H₂O), oxygen shares two electrons with hydrogen atoms.
Carbon dioxide has the molecular formula CO₂.
Valency of Helium is 2.
Percentage: 0%
Which of the following elements has zero valency?
What is the number of valence electrons in a neon atom?
Which element has one electron in its outermost shell?
Which of the following compounds is formed by the crisscross method?
Which of the following atoms shares electrons to attain stability?
Valency of chlorine is:
The valence electrons of an element determine:
Water molecule is formed by:
The molecular formula of carbon dioxide is determined by:
How many electrons are in the valence shell of oxygen?
The electrons in the outermost shell are called ______ electrons.
The outermost shell of an atom is called ______ shell.
Atoms with 1 to 3 valence electrons usually ______ electrons.
Atoms with 5 to 7 valence electrons usually ______ electrons.
Atoms with 4 valence electrons usually ______ electrons.
Valency is the number of electrons ______, gained, or shared.
Helium does not take part in general chemical reactions because its valency is ______.
The molecular formula of water is ______.
Calcium chloride has the molecular formula ______.
In carbon dioxide, carbon shares electrons with ______.