3QA-Review

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Chapter 3 QA Review

1- What force is responsible for attraction-repulsion of atoms towards one another: a- strong force b- weak force c- electromagnetic force d- gravitation

2- Spacial reach of the electromagnetic force of an atom: a- is contained within the boundaries of its electron orbitals b- push out beyond the atom in space, attracting-repulsing other atoms in a specific spacial manner

3- The shape of the atom is determined by the electron orbitals: a- true b- false

4- Almost all atoms exert _____ electrical field into space: a- symmetric b- asymmetric

5- Atoms binding involves: a- covalent bonds, i.e. mutual sharing of electrons b- ionic (or valent), that is one atom takes over an electron of the other atom c- all of the above

6- Ions are formed when the one atom retains the electron(s) of the other atom it has bound with; a- true b- false

7- When sodium chloride (salt) dissolves in water: a- sodium and chlorine ions are let loose b- sodium chloride retains its molecular integrity

8- Spacial shape of molecules are: a- symmetric b- asymmetric c- all of the above

9- crystals exhibit ____ geometry: a- symmetric b- asymmetric

10- Electrical conductors such as copper conduct electricity because: a- the outer electrons of the molecular structure are free to move in an electrical field b- the molecules are free to move in an electrical field

11- Electrical insulators do not conduct electricity because: a- its molecules are not free to move in an electrical field b- its electrons are not free to move in an electrical field

12- Which of these statements are true: a- silicates exhibit the capacity for incorporation of a wide variety of atoms within their molecular structures b- silicates have a little capacity for incorporation of other atoms within their molecular structure

Answers

1-c, 2-b, 3-a, 4-b, 5-c, 6-a, 7-a, 8-c, 9-a, 10-a, 11-a, 12-a