Which group of the periodic table is most likely described by questions 1-4? (2

Question

Which group of the periodic table is most likely described by questions 1-4?

(2 Marks, 0.5 for each)

1) These elements are very strong oxidizers.

2) These elements have a charge of +2 when forming ionic compounds.

3) These elements are radioactive.

4) These elements are rare, have high densities, and are used for various industrial       

    purposes.

For problems 5& 6, describe the oxidation state of each element when it forms ionic compounds: (1 Mark, 0.5 for each)

5) Oxygen.

6) Gallium.

For problems 7& 8, determine the number of valence electrons each element has:

(1 Mark, 0.5 for each)

7) Sulfur.

8) Helium.

The following electron configurations belong to which elements: (1Mark, 0. 5 for each)

1) 1s22s22p63s1 ____________________________________

2) [Kr] 5s24d10 _____________________________________

Question 2: (5 Marks)

Define proteins and amino acids. (2Marks)

Mention the functions of carbohydrates. (3Marks)

Answer all questions Ouestion 1: (5 Marks) Using the periodic table answer these questions: Periodic Table ILA IVA VA. VIA VIIA He Li Be of Elements B C N to F Ne 3 Na Mg IllB VB VB VIB VIIB B AI Si P S CI Ar Ga Ge AS 5 Rb Sr Y Zr Nb Mo Ru Rh Pd Ag Cd in S In Sb Te 6 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg TI Pb Bi Po At Rn 89 05 106 107 108 09 7 Fr Ra +AC 06 107 108 110 Rf A Lanthanide 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Ce Pr Nd Series Actinide Th Pa U Series Legend click to find out more... H gas i solid Br liquid Tc-synthetic Transition Metals Non-Metals Rare Earth Metals Halogens Alkali Metals Alkali Earth Metals Other Metals Inert Elements

Explanation / Answer

1. The elements from group halogen are good oxidizers . Because these elements are having high electron affinity , low bond energy , high electronegativity with high electrode potential which mainly response to help to receive the electron.

2. The charge of +2 oxidation state is Alkaline earth metals.

3. Actinides are radioactive

.

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