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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| What do atoms form when they combine with atoms of another element | Compounds
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| What holds atoms together in a compound | Chemical bond
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| How many electrons do the noble gases (group VIII) have on their outer shell | 8, they have a full outer shell
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| Are group VIII elements stable or unstable | Stable
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| What does the Octet Rule state | Atoms bond together so that each atom ends up with an electron arrangement with 8 electrons in its outermost shell
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| When is an ionic bond formed | When electrons are given of taken by atoms
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| What is an ion | A positively or negatively charged atom or group of atoms
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| If an atom loses electrons does it become positively or negatively charged | Positively
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| If an atom gains electrons does it become positively or negatively charged | Negatively
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| A sodium atom has an electronic configuration of 2, 8, 1, is it stable | No, it easily loses its outer electron
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| A chlorine atom has an electronic configuration of 2, 8, 7, is it stable | No, it will easily gain an electron
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| If sodium loses it electron what does it become | Sodium ion with a charge of +1
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| If chlorine gains an electron what does it become | Chlorine ion with a charge of -1
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| Is a chlorine ion and a sodium ion attracted to one another | Yes because they have opposite charges
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| When a chlorine ion and a sodium ion, bond with one another, what is formed | Sodium chloride
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| Does a chlorine ion have a full outer shell | Yes, it gains one
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| Does a sodium ion have a full outer shell | Yes, it loses one
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| A magnesium atom has an electronic configuration of 2, 8, 2, is it stable | No, it needs to lose 2 electrons
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| If Mg loses 2 electrons, what does it become | Magnesium ion, with a full outer shell
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| An oxygen atom has an electronic configuration of 2, 6, is it stable | No, it needs to gain 2 electrons
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| If oxygen gains 2 electrons, what does it become | Oxygen ion with a full outer shell
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| When a magnesium ion and an oxygen ion bond together what is formed | Magnesium oxide
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| How is an ionic bond formed | Ir is formed by the force of attraction between a positive and a negative ion
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Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
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