Chemistry
Elements with 2 electrons in their outermost shells are known as :
- Alkali metals
- Halogens
- Alkaline earth metals
- Inert gases
Periodic Table
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Answer
Alkaline earth metals
Reason — Group 2 elements known as alkaline earth metals, have two electrons in their outermost orbit.
Alkali metals have 1 electron in their outermost shell. Halogens have 7 valence electrons. Inert gases have 8 valence electrons (complete shell), except helium (2).
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Related Questions
All the members of group 15 have ……………. electrons in their outermost orbit.
- 3
- 7
- 5
- 8
Which of the following statements is correct with respect to the elements — Na, Mg, Al, Si, P, S and Cl.
- Each element belongs to the same group.
- Valency of each element is the same.
- Each element belongs to the same period.
- They are all metals.
Elements which have their outermost orbits incomplete are:
- Transition elements
- Noble gases
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- Representative elements
The element with atomic number 16 is placed in the modern periodic table in:
- 2nd period and VI A group
- 3rd period and IV A group
- 3rd period and VI A group
- 2nd period and IV A group