Question

The elements in group 17 of the periodic table are all called halogens. All halogens have the same

a. atomic number.
b. atomic mass.
c. number of possible isotopes.
d. number of valence electrons.

Answer 1

Answer:

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Halogens are nonmetals in group 17 (or VII) of the periodic table. Down the group, atom size increases. As a diatomic molecule, fluorine has the weakest bond due to repulsion between electrons of the small atoms. Due to increased strength of Van der Waals forces down the group, the boiling points of halogens increase.— The halogens are located on the left of the noble gases on the periodic table. These five toxic, non-metallic elements make up Group 17 of the periodic table and consist of: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).The halogens are nonmetallic elements in Group 17 of the periodic table. They include fluorine, chlorine, bromine, iodine, and astatine. Ununseptium, which is not a naturally occurring element, is also often considered a halogen. As typical nonmetals, they have low melting and boiling points.Halogens. Other chemicals commonly used for disinfection are the halogens iodine, chlorine, and fluorine. Iodine works by oxidizing cellular components, including sulfur-containing amino acids, nucleotides, and fatty acids, and destabilizing the macromolecules that contain these molecules.

Explanation:

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Answer 2

d. number of valence electrons remains same.

• The periodic table is arrangement of elements found in nature on the basis of atomic number. It has seven periods and eighteen groups.
• Down the group number of valence electrons remains the same but number of shell increases.
• Across the period number of shell remains same but number of valence electrons increases.