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Atoms, Molecules And Reactions
Test Description: Prepare for Fall Final Exam
Instructions: Answer all questions to get your test result.
1) When measuring a substance the _____________ digit is an estimated digit.
A
digit after the decimal
B
last
C
digit before the decimal
D
first
2) The particles in a snow globe represent a
A
suspension
B
homogenous mixture
C
compound
D
solution
3) The nucleus was discovered by ______________ when he found that __________.
A
Rutherford ...... gamma particles have no mass
B
Mendeleev....atomic number increases with atomic mass
C
Rutherford...... alpha particles deflected back
D
Mendeleev.... atomic mass increases with atomic number
4) Which scientist based periodic on atomic NUMBER?
A
Mendeleev
B
Mosley
C
Meyer
D
Rutherford
5) Electrons were discovered using which piece of equipment?
A
geiger counter
B
nuclear reactor
C
cloud chamber
D
cathode ray tube
6) The third period of the period table contains
A
s, d and f blocks
B
s block only
C
s and p blocks
D
p block only
7) Which is NOT true of ionic compounds
A
they have a crystalline structure
B
they have high melting points
C
they are usually in a gaseous state
D
electrons are transferred
8) How do you determine the relative polarity of a molecule?
A
Add the number of protons
B
Subtract the atomic masses
C
The farther the elements are from fluorine, the more polar they are
D
Non-polar molecules are ionic
9) The symbol after a formula indicates
A
the number of moles
B
the coefficient
C
the state of matter
D
the ratio of atoms
10) Which bond is the LEAST polar?
A
Li --Cl
B
Ca--F
C
Na--Cl
D
P--O
*select an answer for all questions
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