Answer:
A is correct
Explanation:
B speaks of the skeletal system
C speaks of the respiratory system
D speaks of the thoracic cavity and respiratory system
- Hope that helps! Please let me know if you need further explanation.
A is your answer................???
Answer:
The physical and chemical properties of elements are periodic function of their atomic weights. This is Mendeleev's periodic law.
63 elements were classified by Mendeleev.
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