The central core of an atom is called the

How did plastics become the material of choice for so many varied applications?

What is the mass of one mole of titanium atoms

Copper exists in two naturally occurring isotopes. The average atomic weight of copper is 63.546 amu. If 69.15% exists as 63cu with an atomic mass of 62.92, then what is the atomic mass of the second isotope?

How do you over-saturate a liquid

When 2.246 grams of a calcium chloride hydrate was heated, 0.728 grams of water were released. Determine the formula of the hydrate (Hint: take the same approach as for the copper (II) sulfate hydrate).

Which of the following are sources of low-level radiation? A) medical X-rays B) nuclear weapons testing C) buring of fossil fuels D) all of the above E) a and c only

How does the nucleus of an atom change after beta decay? a. The nucleus remains the same b. The nucleus gains an electron. (c.) The nucleus loses a neutron. d. The nucleus loses a proton

Calculate Zeff for the 4s electron in a copper Cu

And the cell potential is - 54.0 mv (inside negative), calculate the maximum ration of

What is the final ph of a solution created by adding 12 ml of 0.5 m hcl to 300 ml of 100 mm formate if the pka for formic acid is 3.78?