1:3
The ratio of Al3+ ions to Cl− ions in the chemical formula is 1:3.
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<span>The "exosphere" is the most distant and tenuous "layer" of our atmosphere.</span>
Circulating round the nucleus are the electrons in various orbits of different energy levels. Electrons are negatively charged and represented by the symbol 'e'. In the given image the number of protons are -6. Hence the element in question is Carbon as Carbon has the atomic number 6.
1s2 2s2 2p6 3s2 3p6 4s1
s orbital can hold 2 electron
p orbitals can hold 6 electron