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Pre-test
Directions: Read the questions carefully and encircle the letter of the correct answer
1. Which is NOT an example of compound?
A. Helium (He)
B. Carbon dioxide (CO2)
C. Isopropyl alcohol (C3H2O)
D. Water (H20)
2. At present, how many elements are there in the periodic table?
A. Fifty
B. One hundred
C. One hundred eighteen
D. One hundred twenty
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Answer:
1)a
2)a
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