Answer: Mendeleev's periodic law was that the properties of elements varies periodically with the atomic weight. Moseley's periodic law or modern periodic law is that the properties of elements are periodic function of their atomic number
Most of the mass of an atom comes from the electron cloud would NOT describe the structure of an atom
Answer:
B
Explanation:
E = hc/
. Remember, it is in meters not nanometers so you have to convert. You end up with B.
Answer:
It is a semi circle with a triangle on top
