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6. Bases react with acids in an endothermic neutralisation reaction?
7. Salts are produced when the hydrogen ions in acid are replaced by...
- metal ions.
- both of the above.
- ammonium ions.
8. Oxidation and reduction always occur at the same time.
9. The First Ionisation Energy is the energy required to do what...?
- remove one electron from the outer shell of every atom in a mole of gaseous atoms.
- remove all the outer electrons from every atom in a mole of gaseous atoms.
- turn one mole of 1+ ions into one mole of atoms.
10. How many electrons are there in 'n=3'
11. S-orbitals are the same shape as P-orbitals
12. In covalent bonding, the atoms involved always gain full outer shells.
13. In a dative covalent bond....
- the bond only lasts for a short period of time.
- the bonding pair of electrons is provided by one of the atoms.
- neither atom has a full outer shell.
14. The bond angle of water is described as...
15. L(one)P(air)-B(onding)P(air) repulsion is stronger than...
- BP-BP repulsion
- LP-LP repulsion
16. Van der Wall forces increases as ____ increases also.
- number of electrons
- neutron number
- radioactivity
17. Graphite and Carbon differ in....
- atom type.
- electronegativity.
- structure.
- bonding type.
18. elements are arranged in the periodic table by...
- atomic number.
- atomic mass.
19. Group 2 elements...
- form metallic bonds.
- all of the above.
- are good conductors.
- form +2 cations.
20. Calcium Carbonate undergoes thermal decomposition to form...
- Calcium Oxide and Carbon Dioxide.
- Calcium Oxide and Carbon Monoxide.
- Calcium and Carbon Dioxide.