Chemistry
A compound has a formula = 'H2Y'. Y denotes a non-metal. State the following:
- The electronic configuration of Y.
- The valency of Y.
- The bonding present in 'H2Y'
- The bonding present in the compound formed between potassium () and 'Y'
- The formula of the compound formed between calcium () and Y.
Chemical Bonding
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Answer
- The element Y needs 2 electrons to complete it's octet, so it will have 6 electrons in the outer most shell. Hence, will have 2, 6 as the electronic configuration. It is the electronic configuration of non-metal 'Oxygen'.
- 2 is the valency of element Y as it has 6 electrons in the outer most shell and needs two electrons to complete it's octet and attain a stable state.
- Covalent bond is present because each of hydrogen atom shares an electron pair with element Y such that hydrogen acquires a duplet configuration and Y an octet configuration and both become stable, hence form covalent bond.
- Ionic bond is present between potassium () and 'Y' because K is a metal and Y is a non-metal.
- CaY is the formula for the compound formed between calcium () and Y by transfer of two valence electrons. (As the electronic configuration of Y matches that of Oxygen so the actual formula will be CaO)
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Related Questions
With reference to a molecule of water, fill in the blanks with the correct word. [at. no. of H = 1, O = 8]
Water is a …………… [non-polar/polar] covalent molecule in which the atom of …………… [hydrogen/oxygen] attracts electrons more strongly towards itself. The water molecule shows the presence of …………… [double / one single / two single] covalent bond/s and …………… [one/two] lone pair of electrons present in the …………… [hydrogen/oxygen] atom.
Complete the table given below:
Element Element Type of bond likely in molecule of Formula of compound A: At. no. = 20 B: At no. = 8 A and B A: At no. = 20 C: At no. = 17 A and C D: At. no. = 9 D: At. no. = 9 D and D E: At. no. = 12 F: At. no. = 16 E and F G: At. no. = 1 F: At. no. = 16 G and F Fill in the blanks with the correct word from the brackets:
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Electronic configuration of the following elements are given:
- Sodium — Na = 2, 8, 1
- Hydrogen — H = 1
- Carbon — C = 2, 4
- Chlorine — Cl = 2, 8, 7
- Lithium — Li = 2,1
State which of the compounds given below:
(a) have high/low boiling points,
(b) are soluble/insoluble in organic solvents.A : Hydrogen chloride
B : Sodium chloride
C : Sodium hydride
D : Lithium chloride
E : Carbon tetrachloride