How can you tell a single displacement reaction occurred?

relative humidity is a measure of the amount of moisture in the air relative to the total amount of moisture the air can hold.

so d

what is the question?

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.

i think its 100.

hope this !