Halogens and Their Physical Properties

Which group of elements are known as halogens?

• fluorine, chlorine, bromine, iodine, astatine

• carbon, nitrogen, oxygen, phosphorus, sulfur

• sodium, potassium, lithium, rubidium, cesium

• helium, neon, argon, krypton, xenon

Which halogen is the most reactive?

• bromine

• chlorine

• iodine

• fluorine

Which halogen is the least reactive?

• iodine

• bromine

• chlorine

• fluorine

What is the boiling point of chlorine?

• -34.04 degrees Celsius

• 100 degrees Celsius

• 0 degrees Celsius

• -101.5 degrees Celsius

What is the boiling point of iodine?

• 100 degrees Celsius

• 212 degrees Celsius

• 0 degrees Celsius

• 184.3 degrees Celsius

What is the physical state of bromine at room temperature?

• plasma

• gas

• liquid

• solid

In what state are these elements at room temperature?

Groups:

(a) Solid

,

(b) Liquid

,

(c) Gas

• bromine

• iodine

• fluorine

• astatine

• chlorine

Rearrange the halogens in order of increasing reactivity:

• fluorine

• iodine

• astatine

• chlorine

• bromine

Match the halogens to their physical appearance:

• purple solid

• chlorine

• pale yellow gas

• bromine

• black solid

• fluorine

• brown liquid

• iodine

• yellow-green gas

• astatine

What is the chemical symbol of fluorine?

• Fr
• Fu
• F
• Fl
• Fn