Potassium (K) and copper (Cu) are both in period 4. They both have . four electron shells
similar properties
the same number of electrons
the same number of protons

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity

Suppose you discovered a new element with 120 protons and 2 electrons in its outer level . i'm what group does this new element belong? what properties would you expect it to have