Initial Knowledge Check Question 4
Rank the effective nuclear charge Z' experienced by a valence electron in each of these atoms:
atom
z' experienced by a
valence electron.
An atom of palladium
2.
✓
An atom of molybdenum.
2
An atom of yttrium.
3
An atom of silver.
(pick one)
(pick one)
1 (highest)
?
2
3
4 (lowest)

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.

What methods could you use to solubilize calcium carbonate