Answer:
1s2 2s2 2p2
Explanation:
it has 6 electrons in two energy levels so the sub levels are 1s, 2s and 2p
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Both figures are mixtures,
Figure II is a heterogenous mixture
Figure I is a homogenous mixture
Distance and time is needed for determining speed
Those are called isotopes,
the answer is 3.
each element has its own unique number of protons (atomic number) but a different number of neutrons can be shown in example number 3.
