If you have ever noticed a sharp odor in the air after a thunderstorm, you might be smelling ozone. Ozone can be formed from oxygen gas when lightning passes through the air. Which statement is true about ozone?
A. Ozone helps human health no matter where it occurs.
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B. Ozone is a harmful pollutant no matter where it occurs.
C. Ozone high in the atmosphere is a pollutant, but near Earth's surface, it provides protection from harmful rays.
D. Ozone high in the atmosphere protects Earth's surface from harmful rays, but near Earth's surface, it is a pollutant,

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.