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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A student is given the electronic configuration 2,8,8,1 for an element. What is the element and its valency?
An atom of phosphorus has the electronic configuration 2,8,5. What is its valency?
An atom of sulfur has the electronic configuration 2,8,6. What is its valency?
Describe how the octet rule relates to the concept of valency.
Describe the difference between valency and valence electrons.
Explain why elements in the same group of the periodic table have similar chemical properties.
Explain why noble gases are generally unreactive in terms of their valence electrons.
A student is given the electronic configuration 2,8,8,1 for an element. What is the element and its valency?
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 of the following elements has 1 valence electron? (1) Potassium (2) Calcium (3) Oxygen (4) Neon
Which of the following elements has a valency of 0? (1) Argon (2) Sulfur (3) Potassium (4) Fluorine
Which of the following elements has a valency of 2? (1) Sodium (2) Magnesium (3) Chlorine (4) Nitrogen
Fill in the blank: An atom of sodium (Na) loses one electron to achieve a stable configuration. Its valency is _______.
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 a chlorine atom is _______.
Fill in the blank: The valency of an element is usually equal to either the number of valence electrons or _______.
True or False: All elements in Group 1 of the periodic table have the same valency.
True or False: The number of valence electrons determines the chemical reactivity of an element.
True or False: The valency of an element can be zero.
True or False: The valency of carbon is 4 because it has 4 electrons in its outermost shell.
