Chemistry
In the periodic table, the elements of a same group have the same:
- Number of valence electrons
- Mass number
- Atomic number
- Number of electrons
Related Questions
The position of elements A, B, C, D and E in the periodic table are shown below:
Group 1 Group 2 Group 17 Group 18 – – – D – B C – A – – E (a) State which are metals, non-metals and noble gas in this table.
(b) State which is the most reactive (i) metal (ii) non-metal.
(c) Which type of ion will be formed by element A, B and C.
(d) Which is larger in size (i) D or E (ii) B or C.
Write the electronic configuration of the element 3517T.
(a) What is the group number of T?
(b) What is the period number of T?
(c) How many valence electrons are there in an atom of T?
(d) What is the valency of T?
(e) Is it a metal or a non-metal?
(f) State number of protons and neutrons in T.
The number of elements in the largest period of the periodic table is:
- 18
- 8
- 32
- 42
All the members of group 15 have ……………. electrons in their outermost orbit.
- 3
- 7
- 5
- 8