29. Which pair of elements has the most physical and chemical properties in common? *
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A. Hydrogen (H) and Helium (He)
B. Boron (B) and Carbon (C)
C. Neon (Ne) and Argon (Ar)
D. Sodium (Na) and Florine (F)

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

i got you i did it ya know what it is just needing to fill this in for a quick task!