Answer:
The characteristics are as follows:
-It is microscopic.
-It contains three sub atomic particles namely: electrons, protons and neutrons.
-It is the smallest unit of any substance (except for living bodies since smallest unit of them is cell).
-When seen from microscope atoms appear to be blur, spheres.
-They form ions(by losing or gaining electrons) and molecules(by combining with itself or other atoms).
<em><u>Hope this helps :)</u></em>
We know that the molar mass of Al is 27 g/mol.
27 g Al* (1 mol Al/ 27 g Al)= 1 mol Al.
The final answer is 1 mol Al~
<span>It can be inferred from atomic line spectra. These are certain wavelengths of light that atoms give off when they become excited. The energy levels in an atom can be proven to exist from this phenomenon, and furthermore, they can be measured.</span>
12, if the decimal is over five, round up. If it's not, round down. Not sure what you mean by significant figures.
IDK THE ANSWER BUT I THINK I NEED HELP ON THIS ONE TO
