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The Periodic Table
Brass is an alloy of copper and zinc. Which answer best explains why it's used to make the pins on an electric plug?
It does not corrode with water and it's shiny
It's a good conductor of electricity and it's dense
It's a good conductor of electricity and it's hard
The particles in a solid metal are in a regular arrangement. Which answer best describes this arrangement?
Metals generally have high melting points and boiling points because:
The particles are held together by strong metallic bonds
The loose electrons can move easily
The particles are held together by strong covalent bonds
are called superconductors because they are super expensive
have little or no electrical resistance
work at any temperature
An electric current is the movement of which subatomic particles?