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Give the name of the instrument used to determine the structure of crystals. 2. Below are some properties of chlorine, bromine and their compounds. Which property has a smaller value for chlorine than
Chemistry
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B
Here are the answers to the chemistry questions:
1. Give the name of the instrument used to determine the structure of crystals.
The instrument used to determine the structure of crystals is based on X-ray diffraction. An X-ray goniometer is a key component of such an instrument, measuring the angles of diffracted X-rays.
The correct answer is B.
2. Below are some properties of chlorine, bromine and their compounds. Which property has a smaller value for chlorine than bromine.
- A Bond strength of hydrogen-halogen bond: H-Cl bond is stronger than H-Br bond (bond strength decreases down the group). So, chlorine has a larger value.
- **B Strength of van der Waals forces between molecules
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