Advertisements
Advertisements
प्रश्न
Rewrite the following statement after correction, if necessary:
Elements in the same period have equal valency
उत्तर
Elements in the same group have equal valency.
APPEARS IN
संबंधित प्रश्न
How many groups and periods are there in the modern periodic table?
From the following elements :
4Be; 9F; 19K; 20Ca
(i) Select the element having one electron is the outermost shell.
(ii) two elements of the same group.
Write the formula of and mention the nature of the compound formed by the union of 19K and element X(2, 8, 7).
Define the term : Atomic size
Match the atomic number 2, 4, 8, 15 and 19 with each of the following
1) A solid non metal belonging to the third period.
2) A metal of valency 1.
3) A gaseous element with valency 2.
4) An element belonging to Group 2
5) A rare gas.
Why do elements in the same group show similar properties but the elements in different groups show different properties?
Name two elements you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Name the non-metals present in period 2 and metals in period 3.
First ionization enthalpy of two elements X and Y are 500 KJ mol-1 and 375 KJ mol-1 respectively. Comment about their relative position in a group as well as in a period.
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The similarities in the properties of elements belonging to a group are because they have the same ______
