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Mixture, Compounds And Atoms

27 Questions  I  By Cancerred
Based on science knowledge.

  
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Question Excerpt

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1.  Which of the following describes what happens when an atom becomes an ion with a 2– charge?
A.
B.
C.
2.  What is paper chromotography?
A.
B.
3.  What is Evaporation?
A.
B.
C.
4.  This type of mixture has a composition that is not uniform.
A.
B.
5.  Mixtures can be separated by:
A.
B.
6.  This type of mixture has the same composition through out.
A.
B.
7.  Which of the following particle has no charge?
A.
B.
C.
8.  Which particle orbits the nucleus?
A.
B.
C.
9.  What is Distillation?
A.
B.
C.
10.  A positive ion is a:
A.
B.
11.  Atoms bond by ____ electrons.
A.
B.
C.
D.
12.  The first energy level is closest to the nucleus and can hold up to ____ electrons.
A.
B.
C.
13.  A pure substance made up of two or more elements chemically combined in a fixed proportion can be sub-divided by chemical means only is a
A.
B.
14.  Atoms ____ to have a filled outermost energy level
A.
B.
15.  This is the solid remaining in filter paper after filtration.
A.
B.
16.  What is Filtration?
A.
B.
C.
17.  Which of the following particle has a positive charge?
A.
B.
C.
18.  Which bond exchanges electrons?
A.
B.
19.  Atoms are composed of :
A.
B.
C.
20.  Most atoms form bonds using only the electrons in their ____ energy level.
A.
B.
21.  Separating funnel 
A.
B.
C.
22.  An impure substance made up of two or more elements or compounds both mechanically mixed into any proportion and can be further sub-divided by physical means is a
A.
B.
23.  This is the liquid which passes through filter paper during filtration.
A.
B.
24.  The second energy level can hold up to ____ electrons.
A.
B.
C.
25.  A negative ion is a:
A.
B.
26.  Compounds can be separated by:
A.
B.
27.  Which of the following is a pure substance made up of one type of atoms?
A.
B.
C.
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