The answer is A.<span>Boron and carbon are likely together in one period because they have very close atomic numbers, while gallium and germanium are likely together in another period because they have very close atomic numbers. </span>
The element that are most likely in the same period of periodic table is
<em> Boron and carbon are likely together in one period because they have very close atomic number, while gallium and germanium are likely together in another period because they have very close atomic numbers ( answer A)</em>
<u>Explanation</u>
Element in same period have the close atomic number .
The atomic number of an element is determined by number of protons the element have.
The number of proton are equal to number of electrons
Therefore boron is in atomic number 5 with 2.3 electronic configuration while carbon is in atomic number 6 with 2.4 electron configuration
since both boron and carbon have two energy level they are in period 2.
Gallium is in atomic number 31 with 2.8.8.8.5 electron configuration while Germanium (Ge) is in atomic number 32 with 2.8.8.8.6 electron configuration.
Since both gallium and germanium has 5 energy level they are in same period (period 5)
for example Aluminum,boron and gallium are in group (iii) since they have 3 valence electrons.
<span>The particles in a liquid are not stuck in fixed positions, which is why liquids flow to take the shape of a container into which they are placed. Hope this helps :D</span>
