The correct order of density of the following elements is: (Be, Mg, Ca, Sr)

B e > M g > C a > C r

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C a > M g > B e > S r

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C a < M g < B e < S r

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M g < C a < S r < B e

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Solution

The correct option is C $C a < M g < B e < S r$
1. $C a < M g < B e < S r$

2. Size of alkali metals increases down the group, so volume also shows increment, and since volume is inversely proportional to the density but in case $S r$ and $B a$ increase in the volume is less compared to increasing mass.

3. So down the group density decreases first and then increases.

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Similar questions

B e^{2 +}

M g^{2 +},

S r^{2 +}

C a^{2 +}

In the modern periodic table the elements Be, Mg, Ca, Sr, Ba and Ra belong to the group

B e^{2 +}

M g^{2 +},

S r^{2 +}

C a^{2 +}

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