Which of the following is true in regard to ions?
a. ions can only carry positive charges.
b. an ionized atom has a number of protons that is unequal to the number of electrons.
c. a cation will hold a positive charge if it gains one or more electrons.
d. losing one or more electrons will turn an atom into an anion.

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

Connect the whole numbers on the periodic table to indicate what they represent?

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]