1. Two hypothetical elements in the periodic table have different characteristics as shown in the following table. ELEMENT, ELECTRONEGATIVITY, TYPE OF ION, ELECTRICAL CONDUCTIVITY, BRIGHTNESS

X Low Electro cation ion high conduc brightness yes

Y High Electro anion ion none conduc brightness no

According to the data in the table, answer the following questions.

a. If you were to carry out an experiment with these 2 hypothetical elements, write a hypothesis to differentiate them and write another hypothesis about how they would react with oxygen and water.

HYPOTHESIS 1:

HYPOTHESIS 2:

In four steps, design an experiment (write step 1, step 2, step 3 and step 4) to check and verify what types of links would form these elements X and Y if after a series of reactions these elements join in some type chemical bonding.

STEP 1

STEP 2

STEP 3

STEP 4

b. A series of reactions of elements X and Y are given below, complete these reactions bearing in mind that X has an oxidation number +2 and Y has an oxidation number +6.

I. X + O2  XO

II. Y + O2  YO3.

III. XO + H2O  X(OH)2

IV. YO3 + H20  H2YO4.

V. X(OH)2 + H2YO4  A + H2O.

d. Considering the result (A) in reaction number 5,

I. What type of chemical bond do you think A has?

II. What are its physical and chemical properties?

III. Design a four-step experiment so that you can identify the type of chemical bond that substance A obtained in reaction 5 has. The design must contain at least 2 variables to be measured and 2 hypotheses with these variables.