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10The valence shell is the outermost shell of an atom.
All elements in a group have the same valency.
Atomic size increases from left to right in a period.
Electropositivity decreases along a period from left to right.
Electronegativity increases along a period from left to right.
Electropositivity increases down a group.
Electronegativity increases down a group.
Chemical reactivity of metals decreases from top to bottom in a group.
Argon is the most reactive nonmetal in the third period.
Sodium is the most electropositive metal in the third period.
Percentage: 0%
Valence electrons are located in which shell?
The valency of group VIIA elements is:
Atomic size decreases in a period due to:
Which element is the most electropositive in the third period?
Which element is the most electronegative in the third period?
Electropositivity decreases in a period because:
Chemical reactivity of metals:
Chemical reactivity of nonmetals:
Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine belong to which period?
The number of valence electrons of Argon is:
The electrons present in the outermost shell are called ______ electrons.
Valency of group IA elements is ______.
Valency of group IIA elements is ______.
Atomic size decreases from ______ to right in a period.
Atomic size increases from ______ to bottom in a group.
Electropositivity is the tendency to ______ electrons.
Electronegativity is the tendency to ______ electrons.
Reactivity of metals increases ______ a group.
Reactivity of nonmetals decreases ______ a group.
Chlorine is a highly ______ element in period 3.