They can change properties completely
They can be separated
They form a new set of elements and compounds
<span>The elements become part of the original compounds</span>
Method:
1) Find the atomic number in a periodic table: the number of electrons equal the atomic number
2) Use Aufbau rule
Element atomic number electron configuration
<span>
P 15 1s2 2s2 2p6 3s2 3p3
Ca 20 </span><span><span>1s2 2s2 2p6 3s2 3p6 4s2
</span>Si 14</span><span> 1s2 2s2 2p6 3s2 3p2
S 16</span><span><span> 1s2 2s2 2p6 3s2 3p4
</span>Ga 31. </span><span><span> 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p</span> </span>
D Hetero-tropic herbivore <span />
The number of electrons in the outermost shell of an atom determines<span> its </span>reactivity<span>.</span><span>
</span>
Answer:
Metals in nature are found in rock form, mineral forms etc..
