Three elements X, Y and Z have atomic masses 7,8 and 9 . State their positions in the modern periodic table, arrange these elements in the decreasing order of ther atomic radii and write the formula of the compound formed when X combines with Z

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Solution

X - under group 1 in period 2
Y - there is no element with atomic mass 8.
Z - under group 2 in period 2
X > Y > Z (decreasing order of atomic radii )
X cannot combine with Z. Both are metals.

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Three elements X, Y and Z have atomic masses 7,8 and 9 . State their positions in the modern periodic table, arrange these elements in the decreasing order of ther atomic radii and write the formula of the compound formed when X combines with Z

X - under group 1 in period 2 Y - there is no element with atomic mass 8. Z - under group 2 in period 2 X > Y > Z (decreasing order of atomic radii ) X cannot combine with Z. Both are metals.

X - under group 1 in period 2
Y - there is no element with atomic mass 8.
Z - under group 2 in period 2
X > Y > Z (decreasing order of atomic radii )
X cannot combine with Z. Both are metals.