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Mixture, Compounds And Atoms

27 Questions  I  By Cancerred
Mixture, Compounds and Atoms
Based on science knowledge.

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