question1 : which group of periodic table is mostly described : a. elements are

Question

question1 : which group of periodic table is mostly described :
a. elements are very strong oxidizer?
b. elements have a charge +2 when forming ionic compounds ?
c.elements are radioactive ?
d. elements are rare,have high densities,and are used for various industrial purposes?

question 2:describe the oxidation state of each elements when it forms ionic compounds:
a.oxygen?
b. gallium?

question 3 : determine the number of valence electrons of each element has:
a. sulfur?
b. helium?

question 4 : define proteins and amino acids ?

question 5: mention the functions of carbohydrates?

Explanation / Answer

question1 :

a. VIIA group elements Or halogens

b. IIA group elements Or alkaline earth elements

c. Actinides or IIIB group and 7th period elements.

d. Noble gases or zero group

question 2:

a.oxygen oxidation state is -2 . It form ionic bond.

question 3 :

a. sulphur valence electrons are 6

Helium valency electron are 2

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