Which of the following elements is located in period 2 of the periodic table?
A) Oxygen
B) Helium
C) Hydrogen
D) Magnesium
Correct Answer:
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Q18: What is 540 Kelvin in degrees Celsius?
A)266.85
Q19: Which of the following is the atomic
Q20: On which of the following temperature scales
Q21: Which of the following isotopes of iron
Q22: Which option correctly converts 4.51 × 10-5
Q24: Use the periodic table to answer the
Q25: Which of the following elements is a
Q26: Which of the following correctly defines the
Q27: The mass of a grain of sand
Q28: How many neutrons are in germanium-62?
A)62
B)31
C)30
D)32
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