An Electron Configuration of 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Q39: How many electrons are in the

Q40: The isotope of cobalt with the

Q41: A compound is made up of two

Q42: What is the full electron configuration for

Q43: How many protons are in zinc-65?<br>A)33<br>B)30<br>C)36<br>D)66

Q45: What isotope has 2 neutrons and

Q46: Why is carbon dioxide in the atmosphere

Q47: The speed of light is equal to

Q48: How many neutrons does uranium-235 contain?<br>A)92<br>B)140<br>C)143<br>D)235

Q49: One postulate of Dalton's atomic theory defines