Which of the following pairs of elements would have the most similar properties? A. Hydrogen (H) and Helium (He) because they are both gasses

B. Sodium (Na) and Potassium (K) because they have similar reactivity

C. Antimony (Sb) and Silicon (Si) because they are both metalloids

D. Aluminum (Al) and Magnesium (Mg) because they are both silver

How many moles are equivalent to 55.5g of nano3

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas

Which sentence from holes contains an implied personality trait? stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. he'd just been in the wrong place at the wrong time. stanley felt somewhat dazed as the guard unlocked his handcuffs and led him off the bus. stanley nodded to show he understood