If you start with 48 g of a radioactive substance and have 0.75 g left how many half lives have elapsed

Nickel crystallizes in the face-centered cubic (fcc) lattice. the density of the metal is 8902 kg/m3. calculate the radius of a nickel atom.

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

In which situation can a mixture always be called a solution