Answers in appendix e
practice
1. the half-life of polo
after 415,2 days if you ste
half-life ol polonium-210 18 138.4 days. how many milligrams of polonium-210 remain
115.2 days if you start with 2.0 mg of the isotope?

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

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.

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este