What are the elements in Group 7 known as?

Flashcard on Group 7 (Halogens)

Flashcard
•
Chemistry
•
10th Grade
•
Easy
Hanan Alfred
Used 1+ times
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36 questions
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1.
FLASHCARD QUESTION
Front
Back
Halogens
Answer explanation
The elements in Group 7 of the periodic table are known as Halogens. They are characterized by their reactivity and include elements like fluorine, chlorine, and iodine.
2.
FLASHCARD QUESTION
Front
What is a property of halogens?
Back
They are diatomic
Answer explanation
Halogens, such as fluorine and chlorine, exist as diatomic molecules (e.g., F2, Cl2) in their natural state. They are not all gases, not all metals, and many are indeed poisonous, making 'they are diatomic' the correct property.
3.
FLASHCARD QUESTION
Front
What is the state of bromine at room temperature?
Back
Liquid
Answer explanation
Bromine is unique among the halogens as it is a liquid at room temperature, with a melting point of -7.2°C and a boiling point of 58.8°C. Therefore, the correct state of bromine at room temperature is liquid.
4.
FLASHCARD QUESTION
Front
Which halogen is the most reactive?
Back
Fluorine
Answer explanation
Fluorine is the most reactive halogen due to its high electronegativity and small atomic size, which allows it to attract electrons more effectively than chlorine, bromine, or iodine.
5.
FLASHCARD QUESTION
Front
What happens to the melting and boiling points of halogens as you go down the group?
Back
They increase
Answer explanation
As you go down the group of halogens, the melting and boiling points increase due to the greater atomic size and increased van der Waals forces, which require more energy to overcome.
6.
FLASHCARD QUESTION
Front
What color is chlorine in solution?
Back
Pale yellow-green
Answer explanation
Chlorine in solution appears as a pale yellow-green color. This characteristic hue is due to its molecular structure and the way it absorbs light, distinguishing it from other colors listed in the options.
7.
FLASHCARD QUESTION
Front
What type of bond is formed between two halogen atoms?
Back
Covalent bond
Answer explanation
A covalent bond is formed when two halogen atoms share electrons to achieve a full outer shell. This type of bond is typical for nonmetals, including halogens, making 'covalent bond' the correct answer.
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