Advertisements
Advertisements
प्रश्न
Select the correct answer from the options given below.
It is a metal in period 2 having electronic configuration 2, 1?
पर्याय
Beryllium
Lithium
Sodium
Advertisements
उत्तर
Lithium
APPEARS IN
संबंधित प्रश्न
Consider two elements 'A' (Atomic number 17) and 'B' (Atomic number 19) :
(i) Write the positions of these elements in the modern periodic table giving justification.
(ii) Write the formula of the compound formed when 'A' combines with 'B.'
(iii) Draw the electron dot structure of the compound and state the nature of the bond formed between the two elements.
Name the element which is in first group and third period.
Which of the following is the valence shell for the elements of second period of the modern periodic table?
(a) M shell
(b) K shell
(c) L shell
(d) N shell
The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A
Name the non-metals present in period 2 and metals in period 3.
Select the correct answer
Most reactive character among the elements given below is found in
Choose the most appropriate answer from the following list of oxides which fit the description.
A basic oxide.
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (decreasing electronegativity)
With reference to the variation of properties in the Periodic table, which of the following is generally true?
State the property trends in general of elements on moving from left to right in a period of the periodic table.
