This diagram shows a marble with a mass of 3.8 grams (g) that was placed into 10 milliliters (mL) of water. Using the formula D = MV, what is the density of the marble? 0.29 g/cm 3 0.38 g/cm 3 1.27 g/cm 3 2.63 g/cm 3

1.27 g/cm^3

Explanation:

Density of a body is defined as mass/volume. We can easily read off the mass of the marble from the image.

Mass of the body = 3.8 grams

Volume of the body = 3 ml

Density of the body; mass/volume

D= 3.8/3

D= 1.27 g/cm^3

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."