Atoms and Atom Model
To study the changes that occur during photosynthesis,
carbon-12 is added to carbon dioxide
carbon-13 is added to carbon dioxide
carbon-14 is added to carbon dioxide
carbon-14 is added to carbon monoxide
carbon-14 is added to carbon dioxide
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The smallest atom in ‘periodic table’ yet found isA. hydrogen
B. helium
C. lithium
D. magnesium
The symbol of “Boron” is
A. Bo
B. C
C. N
D. Br
When shell L is completed, next electron moves to
A. shell M
B. shell S
C. shell P
D. shell F
The ionic chemical formula of ‘chlorine’ is
A. Cl–
B. Cl+
C. Cl–
D. Cl+
The symbol of Nitrogen is
A. Bo
B. C
C. N
D. Br
The number of protons and electrons in an atom of uranium is
A. 90
B. 91
C. 92
D. 94
Neutrons in an atom also affect the
A. chemical properties
B. physical properties
C. bonding properties
D. thermal properties
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