Beryllium, magnesium and calcium all are located in the alkaline earth group. Which of these characteristics do these elements have
in common?
They cach have similar densities,
They cach have a similar melting point
They each form similar compounds when combined with oxygen
D)
They cach have their valence otectrons in the same energy level

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

The p sub shell can hold up to 8 electrons in an atom. true or false?

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.