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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 before the decimal
B
digit after the decimal
C
last
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...... alpha particles deflected back
B
Mendeleev.... atomic mass increases with atomic number
C
Rutherford ...... gamma particles have no mass
D
Mendeleev....atomic number increases with atomic mass
4) Which scientist based periodic on atomic NUMBER?
A
Mosley
B
Mendeleev
C
Meyer
D
Rutherford
5) Electrons were discovered using which piece of equipment?
A
nuclear reactor
B
cathode ray tube
C
geiger counter
D
cloud chamber
6) The third period of the period table contains
A
s block only
B
s, d and f blocks
C
p block only
D
s and p blocks
7) Which is NOT true of ionic compounds
A
they are usually in a gaseous state
B
they have high melting points
C
they have a crystalline structure
D
electrons are transferred
8) How do you determine the relative polarity of a molecule?
A
Non-polar molecules are ionic
B
The farther the elements are from fluorine, the more polar they are
C
Add the number of protons
D
Subtract the atomic masses
9) The symbol after a formula indicates
A
the state of matter
B
the number of moles
C
the ratio of atoms
D
the coefficient
10) Which bond is the LEAST polar?
A
Ca--F
B
Li --Cl
C
P--O
D
Na--Cl
*select an answer for all questions
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