Name
$(a)$ three elements that have a single electron in their outermost shells.
$(b)$ two elements that have two electrons in their outermost shells.
$(c)$ three elements with filled outermost shells.
Name
$(a)$ three elements that have a single electron in their outermost shells.
$(b)$ two elements that have two electrons in their outermost shells.
$(c)$ three elements with filled outermost shells.
$(a)$ Lithium $(Li)$, sodium $(Na)$, and potassium $(K)$ have a single electron in their outermost shells.
$(b)$ Magnesium $(Mg)$ and calcium $(Ca)$ have two electrons in their outermost shells.
$(c)$ Neon $(Ne)$, argon $(Ar)$, and xenon $(Xe) $ have filled outermost shells.
Similar Questions
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements ?
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements ?
Which element has
$(a)$ a total of three shells, with four electrons in its valence shell?
$(b)$ a total of two shells, with three electrons in its valence shell?
$(c)$ twice as many electrons in its second shell as in its first shell?
Which element has
$(a)$ a total of three shells, with four electrons in its valence shell?
$(b)$ a total of two shells, with three electrons in its valence shell?
$(c)$ twice as many electrons in its second shell as in its first shell?
Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common ?
Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common ?
Compare and contrast the arrangement of elements in Mendeléev’s Periodic Table and the Modern Periodic Table.
Compare and contrast the arrangement of elements in Mendeléev’s Periodic Table and the Modern Periodic Table.
In the Modern Periodic Table, calcium (atomic number $20$) is surrounded by elements with atomic numbers $12$, $19$, $21$ and $38$. Which of these have physical and chemical properties resembling calcium?
In the Modern Periodic Table, calcium (atomic number $20$) is surrounded by elements with atomic numbers $12$, $19$, $21$ and $38$. Which of these have physical and chemical properties resembling calcium?