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 chlorine has 7 valence electrons. What is its most likely valency?
Describe how to determine the number of valence electrons for a main group element using its position in the periodic table.
Describe the difference between valency and oxidation state.
Describe the octet rule and its significance in determining valency.
Explain why elements in the same group have similar chemical properties.
Explain why magnesium forms a +2 ion.
Explain why noble gases are generally unreactive.
Explain why sodium forms a +1 ion.
Which of the following elements has 2 valence electrons?
(1) Beryllium
(2) Boron
(3) Carbon
(4) Nitrogen
Which of the following elements has 6 valence electrons?
(1) Oxygen
(2) Nitrogen
(3) Carbon
(4) Sodium
Which of the following elements has 7 valence electrons?
(1) Sodium (Na)
(2) Chlorine (Cl)
(3) Magnesium (Mg)
(4) Neon (Ne)
Which of the following elements has a full octet in its ground state?
(1) Argon
(2) Fluorine
(3) Sodium
(4) Phosphorus
Fill in the blank: The number of valence electrons in a fluorine atom is ______.
Fill in the blank: The number of valence electrons in a neon atom is ______.
Fill in the blank: The number of valence electrons in magnesium is ______.
Fill in the blank: The valency of calcium is ______.
True or False: The maximum number of valence electrons an atom can have is 8.
True or False: The valency of an element can be zero.
True or False: The valency of an element is always a positive integer.
True or False: The valency of an element is always equal to the number of electrons it needs to gain, lose, or share to achieve a full outer shell.
