Standard temperature and a pressure of 0.5 atmosphere are equal to
A. 0°C and 380 torr
B. 32° C and 380 torr
C. 0°C and 760 torr
D. 32°C and 760 torr

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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