Junior Cert Science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| When is a covalent bond formed | A covalent bond is formed when atoms combine to share electrons
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| What is a single covalent bond | A bond that shares one pair of electrons
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| Name two compounds formed by a single covalent bond | Hydrogen molecule and water molecule
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| How many electrons does hydrogen have on its outer shell | One
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| How many electrons does hydrogen need to become stable | One
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| When two hydrogen atoms meet, what happens | They share electrons and a single covalent bond is formed to form a hydrogen molecule
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| How many electrons does oxygen have on its outer shell | Six
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| 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.
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| How many electrons does carbon have on its outer shell | Four
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| When four hydrogen atoms meet a carbon atom, what is formed | Methane molecule (CH4)
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| What is a double covalent bond | A bond that is formed when atoms share two pairs of electrons
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| Name a molecule where a double covalent bond occurs | Oxygen (O2)
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| How many electrons are present on the outer shell of an oxygen atom | 6
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
gcu science
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