1. Rank the following elements by increasing atomic radius: Carbon, nitrogen, oxygen, potassium, aluminum. 2. Rank the following elements by increasing electronegativity: sulfur, oxygen, fluorine, aluminum, lithium.

3. Arrange the following elements in order of decreasing electron affinity: potassium, lithium, cesium, sodium, francium.

4. Arrange the following elements in order of decreasing ionization energy:

Lithium, oxygen, carbon, boron, fluorine.

5a. Distinguish between a cation and an anion.

5b. How does the size of each compare with the size of the neutral atom from which it is formed?

5c. What is the difference between an atom and an ion?

6. Which atom in each pair has the larger ionization energy?

a. Na or K

b. Cl or Si

c. Li or Be

d. P or Ar

e. Ba or Sr.

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole

it is thermal conduction according to apex : )