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Elements X, Y and Z Have Atomic Numbers 6,9 and 12 Respectively. Which One: Forms an Onion Forms a Cation Has Four Electrons in Its Valence Shell? - Chemistry

One Line Answer

Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:

Forms an onion
Forms a cation
Has four electrons in its valence shell?

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Solution

Atomic numbers of X          Y            Z

                               6          9           12

                            (2, 4)   (2, 7)     (2, 8, 2)

Y(2, 7) forms an anion.
Z(2, 8, 2) forms a cation.
X(2, 4) has four electrons in the valence shell.

Concept: Atomic Number (Z)
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APPEARS IN

Selina Concise Science Chemistry 1 Class 9 ICSE
Chapter 4 Atomic Structure and Chemical Bonding
Exercise 4 (C) | Q 7 | Page 66
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