Halogens = Group 17

Halogens are relatively ____ melting and boiling points that increase steadily down the group.

• low
• high

Halogens becomes ______ in colour when down to group.

• darkens
• brighter

What is the colour of Fluorine, F2?

• pale yellow
• pale green
• dark purple
• brown

What is the colour of Chlorine, Cl2?

• pale green
• pale yellow
• dark purple
• brown

What is the colour of Bromine, Br2?

• brown
• pale green
• pale yellow
• dark purple

What is the colour of Iodine, I2?

• dark purple
• pale green
• pale yellow
• brown

What is the forces in halogens in terms of intermolecular forces?

• van der Waals
• ionic bond
• covalent bond
• metallic bond

Why do the 1st ionization energy of halogens decrease down the group?

• the number of electrons increases
• atomic radius decreases
• increases the attraction between nucleus and the valence electrons
• the strength of shielding decreases
• it is harder for valence shell electrons to ionize

Why do the 1st ionization energy of halogens decrease down the group?

• atomic radius increases
• the number of electrons decreases
• increases the attraction between nucleus and the valence electrons
• the strength of shielding decreases
• it is harder for valence shell electrons to ionize

Why do the 1st ionization energy of halogens decrease down the group?

• decreases the attraction between nucleus and the valence electrons
• atomic radius decreases
• the number of electrons decreases
• the strength of shielding decreases
• it is harder for valence shell electrons to ionize