The atoms of a certain element each contain 11 protons and 1 valence electron. describe this element and its reactivity

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg