Hydrogen bromide is a compound of the two elements hydrogen and bromine. It has a melting point of -87°C and a boiling point of -67°C. Bromine is one of the halogens (Group VII of the Periodic Table.) a Is hydrogen bromide a solid, a liquid or a gas at room temperature (20°C)? b Is it made of molecules, or does it have a giant structure? How can you tell? c What type of bond is formed between the hydrogen and bromine atoms in hydrogen bromide? Show this on a diagram.
Hydrogen bromide is a compound of the two elements hydrogen and bromine. It has a melting point of -87°C and a boiling point of -67°C. Bromine is one of the halogens (Group VII of the Periodic Table.) a Is hydrogen bromide a solid, a liquid or a gas at room temperature (20°C)? b Is it made of molecules, or does it have a giant structure? How can you tell? c What type of bond is formed between the hydrogen and bromine atoms in hydrogen bromide? Show this on a diagram.
Chemistry
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Chapter1: Chemical Foundations
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to Hydrogen bromide is a compound of the two
elements hydrogen and bromine. It has a melting
point of -87°C and a boiling point of -67°C.
Bromine is one of the halogens (Group VII of the
Periodic Table.)
a Is hydrogen bromide a solid, a liquid or a gas at
room temperature (20°C)?
b Is it made of molecules, or does it have a giant
structure? How can you tell?
c What type of bond is formed between the
hydrogen and bromine atoms in hydrogen
bromide? Show this on a diagram.
d Write a formula for hydrogen bromide.
e Name two other compounds that would have
bonding similar to hydrogen bromide.
f Write formulae for these two compounds.
es
Fy
L4 a Use the structures of diamond and graphite to
explain why:
i graphite is used for the lead' in pencils
ii diamonds are used in cutting tools
b Give two reasons why:
i copper is used in electrical wiring
ii steel is used for domestic radiators
c Ethanol is used as the solvent in perfume and
aftershave, because it evaporates easily. What
does that tell you about the bonding in it?
53
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