Where should hydrogen be placed in the modern periodic table? Give reason for your answer. - Noon Academy

Where should hydrogen be placed in the modern periodic table? Give reason for your answer.

Chemistry | Class 10 | Lakhmir Singh | Periodic Classification of Elements

Where should hydrogen be placed in the modern periodic table? Give reason for your answer.

Hydrogen is placed at the topmost position of the periodic table because it resembles the properties of both alkali metals and halogens each. But it is placed in first group above the alkali metals in the modern periodic table because its electronic configuration is similar to that of alkali metals which are placed in 1st group. As the size is small, it exhibits different properties than of alkali metals.

i

More Material

Write chromyl chloride test with equation

What do you understand by lanthanide contraction

What are lanthanide elements?

Explain oxidization properties of potassium permanganate in acidic medium.

Give two differences between double salt and complex salt.

Give two differences between DNA and RNA.

Find the shortest distance between the given lines.
$\begin{array}{l} \square \vec{r}=(\hat{i}+\hat{j})+\lambda(2 \hat{i}-\hat{j}+\hat{k}) \\ \vec{r}=(2 \hat{i}+\hat{j}-\hat{k})+\mu(3 \hat{i}-5 \hat{j}+2 \hat{k}) \end{array}$

Which of the following compounds has tetrahedral geometry? (a) $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{-2}$ (b) $\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{2-}$ (c) $\left[\mathrm{PdCl}_{4}\right]^{2-}$ (d) $\left[\mathrm{NiCl}_{4}\right]^{2}$

Oxidation number of gold metal is (a)+1 (b) 0 (c) $-1$ (d) all of these

Question consists of two statements, namely, Assertion (A) and Reason (R). For selecting the correct answer, use the following code:

Question consists of two statements, namely, Assertion (A) and Reason (R). For selecting the correct answer, use the following code:

Match the following:

← Previous Next →