457 J of heat rated the temperature of 30 grams of an unknown substance by 10C. What is the specific heat of the substance?

neutrons are in the middle of the atom and the electrons, which are much smaller.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the increase of protons   hope this