Answer:
i hope it will help you
Explanation:
electronic configuration 1s²,2s,²2p^6,3s²3p^6,4s^1
as it has one electron in its valence shell so it is the member of group 1A(ALKALI METALS) and the number of shells is 4 so it is in period 4
Answer:
Maybe later, not right now. Tell you when.
A period is the horizontal row of elements in the periodic table and they are numbered from one to seven. In the same period, atomic number increases from left to right. Elements in the same period have the same number of electron energy levels and they transition from a metal to noble gas.
They are gases at STP, unreactive, and are generally monatomic.
Explanation:
Ne, Ar and Kr are monoatomic gases at STP and they are generally unreactive in nature.
- These elements have a completely filled orbitals in their outer energy shell.
- Their completely filled outer shell accounts for their stability and non-reactivity.
- These gases have a high ionization energy and do not react.
- They are monoatomic gases as they are stable on their own.
Learn more:
Noble gases brainly.com/question/1781595
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