group 7 Flashcards
(19 cards)
What are the elements in group 7 of the periodic table commonly called?
Halogens
Which element in group 7 is the lightest?
Fluorine
True or False: All halogens are gases at room temperature.
False
Fill in the blank: The most reactive halogen is __________.
Fluorine
What is the chemical symbol for chlorine?
Cl
Which halogen is a liquid at room temperature?
Bromine
What trend is observed in the boiling points of group 7 elements as you move down the group?
Boiling points increase
What is the term for the ability of halogens to gain an electron?
Electronegativity
Which halogen has the highest electronegativity?
Fluorine
Multiple Choice: Which of the following is a characteristic property of halogens? A) Metals B) Nonmetals C) Noble gases
B) Nonmetals
True or False: Iodine is a solid at room temperature.
True
What is the primary use of chlorine in water treatment?
Disinfection
What type of bond do halogens typically form with alkali metals?
Ionic bonds
Fill in the blank: Halogens exist as diatomic molecules, meaning they form __________ molecules.
Two-atom
What is the chemical symbol for iodine?
I
which elements
fluorine, chlorine, bromine, iodine.
reactivity increases or decreases as you go down?
decreases
physical states at room temperature?
fluorine and chlorine - gases, bromine- liquid, iodine - solid
characteristics?
non-metals, low melting points, do not conduct electricity.
