Advertisements
Advertisements
Question
State the group and period, of the element having three shells with three electrons in valence shell.
Solution
If there are three shells, the element belongs to the third period. An element with three valence electrons belongs to the 13 group.
RELATED QUESTIONS
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
State how the valency of elements varies in a group of the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
How does the property vary in periods and in groups?
The element which has the least tendency to lose electrons is ______
An element which is an essential constituent of all organic compounds belongs to
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
- Identify the element X
- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
