Question

sɪᴍᴘʟɪғʏ: (x²+2ʏ) (x-3ʏ) +5ʏ²


ᴛʜᴀɴᴋs ᴍʏ ᴀɴsᴡᴇʀs​

Answer 1

Answer:

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⇛x²+2ʏ) (x-3ʏ) +5ʏ²

➠ x³-3x²ʏ+3xʏ-6ʏ²+5ʏ²

➠x³-3x²ʏ+3xʏ-ʏ²

➠x²(x-3ʏ)+ʏ(3x-ʏ)

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Answer 2

Answer:

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The combining capacity of an atom is known as its valency. The number of bonds that an atom can form as part of a compound is expressed by the valency of the element.

We all know how electrons in an atom are arranged in shells/orbitals. Valence electrons are those electrons which are present in the outermost orbit of the atom. From the Bohr-bury scheme, we can say that the outermost shell can contain a maximum of 8 electrons. Only a little chemical activity is observed when the outermost shell is completely filled. We can also say that it’s combining capacity becomes zero.

For example, nitrogen forms a number of compounds with hydrogen such as NH3, N2H4, N3H in which nitrogen atoms have valencies of 3, 2 and 1/3 respectively. Thus, this concept of valency as a mere number was not clear. Therefore, later on valency was defined as the number of chemical bonds formed by an atom in a molecule.