Atoms and Atom Model
The groups of elements and compounds are called
atoms
ions
molecules
allotropes
molecules
Related posts
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
To study the changes that occur during photosynthesis,
A. carbon-12 is added to carbon dioxide
B. carbon-13 is added to carbon dioxide
C. carbon-14 is added to carbon dioxide
D. carbon-14 is added to carbon monoxide
Leave a Reply