Topic 2 Structure and bonding Flashcards Preview

Edexcel GCSE Combined Science (Chemistry) > Topic 2 Structure and bonding > Flashcards

Flashcards in Topic 2 Structure and bonding Deck (60)
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1.  What can link two atoms together?

a bond

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2.  Which group of elements is stable and doesnt form compounds easily?

noble gases/group 0 in the periodic table

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3.  How is an elements electron arrangement linked to its position in the periodic table?

Elements in the same group have the same number of electrons in their outer shell.

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4.  How do positive and negative charges affect each other?

They attract each other.

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5.  Which sub-atomic particles of atoms take part in chemical reactions?

electrons

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6.  What is an ion?

an atom that is charged because it has lost or gained one or more electrons

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7.  What happens when an ionic bond is formed?

One atom loses electrons to another atom to form oppositely charged ions that attract each other.

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8.  Which kinds of elements are usually involved in the formation of ionic bonds?

metals and non-metals

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9.  How is a positive ion formed and what is it called?

formed by the loss of electrons; cation

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10.  How is a negative ion formed and what is it called?

formed by the gain of electrons; anion

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11.  What are the forces called that hold ions together?

electrostatic forces / electrostatic attractions / ionic bond

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12. Why do atoms form ions?

to become more stable (like a noble gas)

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13. Explain why group 1 elements such as sodium and lithium form a 1+ ion.

They both have one electron in their outer shell and lose it to become stable.

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14. What are the charges on calcium, oxide and chloride ions?

2+, 2- and 1-

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15. What structure of regularly repeating ions do ionic compounds form?

lattice structure / ionic lattice

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16. What is the formula of the nitrate ion?

NO3-

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17. What is the general name for a positive ion?

cation

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19. What is the general name for a negative ion?

anion

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19. What is the charge on the ions of elements in group 1 of the periodic table?

+1

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20. What is the charge on the ions of elements in group 6 of the periodic table?

-2

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21. What happens to the electrons in the outer shell of metal atoms when they form ions?

they are lost

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22. What is the name of the ionic compound containing calcium and bromine only?

calcium bromide

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23. What is the name of the ionic compound containing potassium, chlorine and oxygen?

potassium chlorate (any element combined with oxygen is an   ___ate )

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24. What does a bond do in an element or compound?

holds atoms together

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25. What are electrostatic forces of attraction?

attractions between positive and negative charges (positive and negative ions)

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26. Which part of an atoms structure is most involved when two atoms react?

the electrons (because they are on the outside of atoms)

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27. How many electrons are in the outer shell of the elements in groups 5, 6 and 7?

5, 6 and 7

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28. What kind of electron arrangement is most stable?

a complete/full outer shell

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29. What is the molecular formula of the very common compound formed between hydrogen and oxygen?

H2O

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30. How many more electrons does an oxygen atom need to get a complete outer shell?

2 more (it gains two electrons and becomes a 2- ion)