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Covalent bonding

Junior Cert Science

QuestionAnswer
When is a covalent bond formed A covalent bond is formed when atoms combine to share electrons
What is a single covalent bond A bond that shares one pair of electrons
Name two compounds formed by a single covalent bond Hydrogen molecule and water molecule
How many electrons does hydrogen have on its outer shell One
How many electrons does hydrogen need to become stable One
When two hydrogen atoms meet, what happens They share electrons and a single covalent bond is formed to form a hydrogen molecule
How many electrons does oxygen have on its outer shell Six
When two hydrogen atoms meet an oxygen atom what is formed They share their outer electrons and a single covalent bond is formed to form a water molecule.
How many electrons does carbon have on its outer shell Four
When four hydrogen atoms meet a carbon atom, what is formed Methane molecule (CH4)
What is a double covalent bond A bond that is formed when atoms share two pairs of electrons
Name a molecule where a double covalent bond occurs Oxygen (O2)
How many electrons are present on the outer shell of an oxygen atom 6
Created by: Teacher Amrein