The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. Which comparison is best supported by this information? They are in the same group because they have similar atomic masses, but they are in different periods because they have different chemical properties. They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers. They are in the same group because their atomic numbers are each multiples of four, but they are in different periods because they have different chemical properties. They are in the same group because they have similar atomic masses, but they are in different periods because they have very different atomic numbers.

Question

Keyon Zuniga

Chemistry

25 December, 00:19

The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. Which comparison is best supported by this information? They are in the same group because they have similar atomic masses, but they are in different periods because they have different chemical properties. They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers. They are in the same group because their atomic numbers are each multiples of four, but they are in different periods because they have different chemical properties. They are in the same group because they have similar atomic masses, but they are in different periods because they have very different atomic numbers.

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Answers (2)

Know the Answer?

Wyatt · Answer 1

I know that it is b

(I just took this)

Dewey · Answer 2

Answer: They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.

Both Be and Ba are in the group two of the periodic table: they are alkaline earth metals.

They, then are in the same group because they have similar chemical properties. Of course they have different atomic numbers, because each atomic number is unique.

When you make the electron distribution of those elements you get:

Be: [He] 2s^2

Ba: [Xe] 6s^2

It is the valence electron shell with two electrons (s^2) what explains their chemical similarity.