1. How does ionization energy change with atomic number? Use evidence from the graph to support your claim. 2. How does ionization energy change across a period and down a group on the periodic table? Use evidence from the graph to support your claim.

3. What describes an effect on ionization energy when moving down a group? Select all correct answers.

A. The ionization energy increases down a group

B. The ionization energy decreases down a group

C. The valence electrons are in energy levels farther from the nucleus

D. The shielding effect is less

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

answerto predict;