I think the answer is Fe. Hope it help!
Answer:
m
Explanation:
C = Fλ
C: Speed of light =
m/s
f: Frequency (Hz)
λ: Wavelength (m)
Rearrange formula for wavelength:
C/F = λ

Answer: 5. Positive
6. Negative
9. Oxygen carbon hydrogen nitrogen
Explanation:
The very common mineral shown in the figure that is referred in this problem that is commonly a pink- to cream-colored mineral with wavy, light-colored lines and does not effervesce would be feldspar. It make up about 41 percent weight of the Earth's crust. It is a group of rocks that contains tectosilicate compounds.
Yes it’s adokngd the formula one