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6.1 And 6.2 Review
Test Description: Review for Chapter 6 sections 1 and 2
Instructions: Answer all questions to get your test result.
1) An atom of fluorine has nine electrons. Its second energy level has _________ electrons.
A
nine
B
seven
C
two
D
eight
2) Which is the negatively charged particle located outside the nucleus of an atom?
A
neutron
B
silicon
C
proton
D
electron
3) Which particle in the nucleus of an atom has a neutral charge?
A
electron
B
carbon
C
proton
D
neutron
4) If an atom has 7 electrons, how many are located in the second energy level?
A
5
B
7
C
3
D
2
5) In the periodic table of the elements, elements in Group 1 have how many outer electrons?
A
1
B
4
C
0
D
8
6) One isotope of carbon differs from another in which way?
A
atomic number
B
number of electrons
C
number of neutrons
D
number of protons
7) Which is the best description of activation energy?
A
Heat released as the reaction proceeds.
B
Heat added to initiate a reaction.
C
Heat stored within the product molecules.
D
Heat stored within the reactant molecules.
8) Which cannot take place during a chemical reaction?
A
formation of new molecules
B
bonds forming between atoms
C
formation of new atoms
D
bonds breaking between atoms
9) What principle can be applied to all chemical reactions?
A
energy loss theory
B
conservation of mass
C
reactants formed from product
D
coefficient principle
10) How many different kinds of atoms does an element contain?
A
six
B
four
C
one
D
two
*select an answer for all questions
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