Asample of calcium contains 0.025 moles how many atoms are in this sample

As we know 1 mole of any substance having particles Na=6.02×10^23

So 0.025 moles of calcium having

1 mole/0.025=6.02×10^23/x

×=0.025×6.02×10^23=1.51×10^22

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.