Biết khối lượng tuyệt đối của nguyên tử natri là 38,1643.10−27 kg. Nguyên tử khối của natri (tính theo u) là giá trị nào sau đây? A. 11 u B. 22,98 u C. 12 u D. 23 u.

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

Why are people not able to scuba dive in the deep part of the ocean

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar