Valency and Valence Electrons
Chemistry ⇒ Atomic Structure and the Periodic Table
Valency and Valence Electrons starts at 8 and continues till grade 12.
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An atom of element X has the electronic configuration 2, 8, 2. What is the valency of X?
An atom of element Y has 1 valence electron. What type of ion will it form?
An atom of phosphorus has the electronic configuration 2, 8, 5. What is its valency?
Describe how to determine the number of valence electrons in a main group element using the periodic table.
Describe the relationship between valence electrons and chemical reactivity.
Explain why elements in the same group have similar chemical properties.
An atom of element X has the electronic configuration 2, 8, 2. What is the valency of X?
An atom of element Y has 1 valence electron. What type of ion will it form?
The valency of an element is determined by: (1) The number of protons (2) The number of neutrons (3) The number of electrons in the outermost shell (4) The atomic mass
Which element has a valency of 1? (1) Oxygen (2) Sodium (3) Carbon (4) Nitrogen
Which group in the periodic table contains elements with 7 valence electrons? (1) Group 1 (2) Group 2 (3) Group 17 (4) Group 18
Which of the following elements has 2 valence electrons? (1) Sodium (2) Magnesium (3) Chlorine (4) Nitrogen
Fill in the blank: Sodium (Na) has ______ valence electron(s).
Fill in the blank: The maximum number of valence electrons an atom can have is _______.
Fill in the blank: The number of valence electrons in an atom of sulfur is ______.
Fill in the blank: The outermost shell of an atom is also called the ______ shell.
True or False: All elements in Group 1 of the periodic table have the same number of valence electrons.
True or False: Elements in the same period have the same number of valence electrons.
True or False: Helium has 2 valence electrons and is stable.
True or False: The number of valence electrons always equals the group number for all elements.
