Using the bohr model describe the changes in electrons energy and electron location when an atom changes from the ground state to an excited state.

Is a dilute solution of copper ii sulfate in water homogeneous or heterogeneous?

The difference between relative abundance and percentage abundance

1. Halogens are good disinfectants. Which of the following is a halogen? A. N B. O C. CI D. Fe

What is the element Ar classified as in the periodic table?

Salt is disstilled in a flask of tap water. Distilling the mixture cause the salt to seperate from the water. Which type of energy is required to begin the distilling process?

How much energy, in joules, does 150.0 g of water with an initial temperature of 25 C need to absorb be raised to a final temperature of 75 C

What mass of oxygen is contained in a 5.8 g sample of NaHCO3?

Which statement correctly compares the number of chromosomes in a body cell to that in a sex cell of humans? A. A body cell has 21 chromosomes; a sex cell has 23 B. A body cell has 21 chromosomes; a sex cell has two C.

Halocarbons contain carbon, hydrogen, and atoms from which set of elements? 1. lithium, sodium, and potassium 2. nitrogen, oxygen, phosphorus, and sulfur 3. nitrogen, oxygen, and fluorine 4. fluorine, chlorine, bromine, and iodine

List at least 3 factors that can influence a body's temperature after death.