Chemistry
An element X belongs to 3<sup>rd</sup> period and 17<sup>th</sup> group, state (i) No. of valence electrons in it. (ii) Name of the element. (iii) Name the family to which it belongs. (iv) Write the formula of the compound formed when X reacts with .
Related Questions
State the trend in chemical reactivity :
(i) Across the third period from left to right,
(ii) Down the group.
(a) in group IA (1) (b) in group VIIA (17)
A metal M forms an oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.
The given table shows elements with same number of electrons in its valence shell.
Elements A B C m.p. 63.0 180.0 97.0 State :
(i) Whether these elements belong to same group or period.
(ii) Arrange them in order of increasing metallic character.
Which one of the following has the largest atomic radius ?
- Sodium
- Potassium
- Magnesium
- Aluminium