PERIODIC TABLE CROSSWORD 5
18
10
11
Across
2. Group I metals
4. Elements in the middle of the periodic
table are the metals.
5. The sum of the protons and neutrons is
the number
6. Inactive gases.
7. The horizontal rows are called
8. Most of the elements are
10. Nonmetals tend to form lons.
Down
1. Most active nonmetals
2. Group II metals
3. Atomic number is the number of -
7. Metals tend to form_lons.
9. The elements are arranged by atomic
11. The vertical columns are called families
or -

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.

What powdery mineral is a health hazard when airborne?