- boron < nitogen < carbon < oxygen < fluorine
- boron < carbon < oxygen < nitogen < fluorine
- boron < carbon < nitogen < oxygen < fluorine
- fluorine < oxygen < nitogen < carbon < boron
Name the following metals.
(i) A metal present in cryolite other than sodium.
(ii) A metal which is unaffected by dilute or concentrated acids.
(iii) A metal present in period 3, group 1 of the periodic table.
Predict the Group of an element X if its atomic number is 16.
Name the following
A metal present in period , group of the periodic table.
- individual elements
- diagonal rows
- horizontal rows
- none of the above
Statement 2: Iron lies in group 8 of the modern periodic table.
Give reason for neon gas does not combine with other elements to form a compound.
All the elements in a group have?
Same mass number
Same number of shells
Same number of valance electrons
None of these
Which one of the above elements belongs to the halogen series?
c. Ag(s) + HCl(aq)→ AgCl⏐↓ + H2↑⏐d. NaOH (aq) + H2SO4 (aq) →Na2SO4 (aq) + H2O(l)
What is the general electronic configuration of the outer shell of the elements from actinoid series?
- this is soft metal
- d-orbital is full
- its melting point is low
- volatile Metal
There is an element X with atomic number 16. A student was assigned a task to write down the features of the group to which this element belongs to. Help him find the group number of the element X so that he can complete his task.
- (d) < (b) < (a) < (c) < (e)
- (d) < (a) < (b) < (e) < (c)
- (d) < (a) < (b) < (c) < (e)
- None of these
If an atom has electronic configuration 1s22s22p63s23p63d104s2 it will be placed in?
The following element is a member of _____ group of the periodic table.
The noble gases that constitute group 18 of the modern periodic table are also known as which of the following?