Physics
Isotopes of an element contain

equal number of protons and electrons
the same number of protons but different number of neutrons
equal number of nucleons
the same number of neutrons but different number of protons

ANSWER DOWNLOAD EXAMIANS APP

Physics
Superconductors are substances which

conduct electricity at high temperatures
conduct electricity at low temperature
offer no resistance to the flow of electricity
offer high resistance to the flow of current

ANSWER DOWNLOAD EXAMIANS APP