Chemistry
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3 ?
Related Questions
Explain why are the following statements not correct:
(i) All groups contain metals and non-metals.
(ii) Atoms of elements in the same group have the same number of electron(s).
(iii) Non-metallic character decreases across a period with increase in atomic number.
(iv) Reactivity increases with atomic number in a group as well as in a period.
State the number of elements in Period 1, Period 2, and Period 3 of the periodic table. Name them.
If an element is in Group 17, it is likely to be …………… [metallic/non-metallic] in character, while with one electron in its outermost energy level (shell), then it is likely to be …………… [metallic/non-metallic].
In Period 3, the most metallic element is …………… (sodium/magnesium/aluminium).