How are the elements within a row different?A.They have different arrangements of core electrons.B.They have different numbers of core electrons.C.They have different numbers of valence electrons.D.They have different period numbers.
Question
How are the elements within a row different?A.They have different arrangements of core electrons.B.They have different numbers of core electrons.C.They have different numbers of valence electrons.D.They have different period numbers.
Solution
The elements within a row on the periodic table are different because C. They have different numbers of valence electrons.
Here's why:
In the periodic table, a row is also known as a period. Elements in the same period have the same number of electron shells. However, as you move from left to right across a period, each element has one more proton and one more electron than the element before it. These additional electrons go into the outermost electron shell, also known as the valence shell.
Therefore, elements in the same period (row) have an increasing number of valence electrons as you move from left to right. These valence electrons determine an element's chemical properties, so elements in the same period can behave very differently from each other.
Similar Questions
Why do elements in the same period of the periodic table have different properties?A.They have different numbers of valence electrons.B.They have different arrangements of core electrons.C.They have different numbers of neutrons.D.They have different arrangements of protons.
In the Periodic Table, the elements are arranged in columns called Groups and in rows called Periods. (a)Complete the table for some of the elements in Period 3.(ii) What is the relationship between the group number and the number of valency electrons?
Which elements occupy the same group in the periodic table?A.Elements that share the same columnB.Elements that share the same rowC.Elements that share the same inside electronsD.Elements that share the same period
Which statement about the periodic table is correct?A. The elements with atomic numbers 8, 16 and 34 have the same number of main energy levels.B. The elements with atomic numbers 8, 9 and 10 have similar chemical properties.C. The elements with atomic numbers 20, 21 and 22 are in the same group.D. The elements with atomic numbers 20, 38 and 56 have the same number of electrons in their outer energy level.
What do the elements of a period have in common? Select all that apply.the same number of electron energy levelssimilar physical characteristicstransition from a metal to noble gassimilar chemical characteristics
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