Atomic StructureEveryday Science
Which of the following statements is true?
Atoms of the same element may have different masses.
Atoms may be divided in ordinary chemical reactions.
Atoms can never combine with any other atoms.
Matter is composed of large particles called atoms.
Atoms of the same element may have different masses.
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A. N
B. F
C. O
D. B
The density of air in the atmosphere is
A. uniform
B. not uniform
C. zero
D. none of above
In the body, the weight of blood is about
A. 1/12th of body
B. 1/5th of body
C. 1/8th of body
D. 1/4th of body
Which substance is present in fuel?
A. Iron
B. Gold
C. Carbon
D. Copper
The energy stored in coal is
A. kinetic energy
B. potential energy
C. chemical energy
D. nuclear energy
A human breath per minute is
A. 16-30 times
B. 16-20 times
C. 15-20 times
D. 15-18 times
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