group 7 flashcards on aqa alevel specification
What is the general electronic configuration of Group 7 elements?
[Ne] 3s2 3p5
Which element is the lightest halogen?
Fluorine
True or False: Chlorine is a gas at room temperature.
True
What is the trend in boiling points of Group 7 elements as you move down the group?
Boiling points increase down the group.
Fill in the blank: The halogens are known for forming __________ with metals.
salts
What color is bromine at room temperature?
Red-brown liquid
Which Group 7 element is used in the production of PVC?
Chlorine
What is the most reactive halogen?
Fluorine
True or False: Iodine is a solid at room temperature.
True
What type of bond do halogens typically form with hydrogen?
Covalent bonds
Which halogen has the highest electronegativity?
Fluorine
What is the main characteristic of halogens when they react with alkali metals?
They form ionic compounds.
What happens to the reactivity of halogens as you go down the group?
Reactivity decreases.
Fill in the blank: The halogens exist in the __________ state at standard temperature and pressure.
gaseous, liquid, and solid
What is the primary use of iodine in medicine?
Antiseptic
Which halogen is a strong oxidizing agent?
Fluorine
What is the color of chlorine gas?
Pale yellow-green
True or False: All halogens can form diatomic molecules.
True
What is the trend in atomic radius of Group 7 elements as you move down the group?
Atomic radius increases.
What is the formula for the compound formed when sodium reacts with chlorine?
NaCl
Which halogen is used in water treatment?
Chlorine
What type of reaction occurs when halogens react with alkenes?
Electrophilic addition
Fill in the blank: The halogens have __________ melting and boiling points compared to other nonmetals.
higher
What is the primary reason for the increasing boiling points of halogens down the group?
Increasing van der Waals forces
