Chemistry Gcse C5 Flashcards

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C5.8

*There is a bigger force between the nuclei and the shared electrons

*because there are four shared electrons with oxygen (contribute 2 each); unlike in chlorine where there are just two (contribute one each)





C5.9

*The attractive forces between small molecule re weak

*little energy is need to overcomes these forces and for molecules to move





C5.9

Explain why the substances in the air are gases at room temperature?



C5.8
Explain why the double covalent bond in oxygen molecules holds the atoms together more strongly than the single covalent bond in the chlorine?


C5.7

*simple molecules have covalent bonds

*bond comes from positively charged nuclei of both atoms are attracted to the negatively charged pair of electrons

*this force holds atoms together strongly and rigidly so atoms cannot move freely



C5.7

Using the idea of bonding explain why simple molecules have a fixed shape?


C5.6

3D diagrams show:
*The true shape of the molecule
* The arrangement of the atoms in space
*The arrangement of the bonds.




C5.6

Explain why 3-D diagrams may be more useful than 2-D diagrams?













C5.5

Nitrogen:78%

Oxygen:21%

Argon:1%

Carbon dioxide: 0.04%



C5.1
How do salts form and what holds the bonding together?



C5.2
*Everything we do carries a certain risk of
Accident or harm.
*Nothing is risk free.
*New technologies and processes based on
scientific advances often introduce new risks


C5.1
*salts form when metals bond with non-metals

*the bonds are held together by strong electrostatic forces of attraction by the oppositely charged ions created by the transfer of electrons.













C5.3
State two common ethical arguments (for and against) about scientific research.



C5.3
* “The best outcome for the greatest
Number of people involved.”
* “Certain actions are considered right or...