I found the complete question:
Which statement about schrodingers theory of the atomic model is true?
A. it proved that the nucleus of an atom is positively charged.
B. it was the first theory to discuss the existence of electrons.
C. it explained the odds of finding the position of an electron.
D. it assumed the electron cloud to be heavier than the nucleus.
Answer:
C. it explained the odds of finding the position of an electron.
Explanation:
Erwin Schrodinger formulated the wave equation of electrons. His wave equation highlighted the probability of where an electron can be found or located in an energy level.
The region of maximum probability of where an electron is located is referred to as an electron cloud or an orbital.
Answer:
3.5 mole of carbon
Explanation:
The atomic mass of carbon is 12.011 grams per mole.
That means, every mole of carbon atoms has a mass of 12.011 grams.
If you have 42.035 grams of carbon atoms, then every 12.011 grams of those carbon atoms, is 1 mole of carbon atoms...
You can solve this using unit conversion:
# mole carbon atoms = 42.035 grams C x (1 mole C / 12.011 g C) = 3.5 mole C
The elements that have the most similar chemical properties are those that have the same number of valence electrons. Elements with the same number of valence electrons can be found in the same column or "group" on the periodic table. The elements that satisfy this criterion are Mg, Sr, and Ba.
Answer:
The first one is correct, 4.03 x 10^24.