Answer:
The answer is C. Sedimentary
Explanation:
Because sedimentary rock is formed from layers of rock over time, fossils are more likely to appear in that particular type of rock.
I hope this helps! :)
Answer: sorry i’m late but the answer is D- wavelength :)
Explanation:
Answer:
atomic number of Be =4
electronic configuration :1s²2s²
but for Be2+ atomic number = 4-2 =2
electronic configuration : 1s²
Mendeleev organized his periodic table in order of increasing atomic number in 1869.