Which of the following electron configurations is impossible? Group of answer choices 1s22s22p63s23p5 1s22s22p63s23p1 1s22s22p63s23p6 1s22s42p63s23p3 1s22s22p63s23p3

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false