Answer:
Potassium
Explanation:
Most reactive metal in the reactivity series
3
H
1
Upper left of chemical symbol= mass number
Lower left= atomic number
Answer:
Amplitude
Explanation:
The amplitude is the vertical distance from the centreline to the crest. The frequency is the number of waves that pass a certain distance in a certain amount of time. The trough is the lowest point of a wave and the wavelength is the distance from one wave to the same point on the other wave.
I believe the answer is A
