. Explain with examples following characteristics of chemical reactions:   a. Change of colour  b. Evolution of gas  c. Change of smell  d. Change of state

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

answer:

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