Question

Based on the information in the table, which elements are most likely in the same periods of the periodic table?

A.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.

B.Aluminum, boron, and carbon are likely together in one period because they were first isolated in the first half of the 1800s, while gallium and germanium are likely together in another period because they were first isolated in the second half.

C.Boron and carbon are likely together in one period because they each end in “-on,” while aluminum, gallium, and germanium are likely together in another period because they each end in “-ium.”

D.Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of valence electrons.

Answer 1

The answer is A.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.

Answer 2

The element that are most likely in the same period of periodic table is

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)

Step-by-step explanation

• 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.