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)

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.