Question

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Answer the questions given in the attachment ✔

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Answer 1

Answer of A

Answer of AJ.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.

Answer of AJ.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.Answer of B

Answer of AJ.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.Answer of BValency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.

Answer of AJ.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.Answer of BValency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.Valency means combining capicity of an element . Relationship between the number of valence electrons and valency: Valence electrons are the number of electrons present in the outermost shell of an atom. ... So,here Oxygen has 6 valence electrons and 2 as its valency .

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Answer 2

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$\longrightarrow\underline{\underline{\red{\sf{question \: a : }}}}$

a.what is the difference in the atomic models of Thomson and rutherford?

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Thomson's experiment:

1) Thomson's experiment was with cathode ray tubes.

2) Thomson's experiment showed atoms which are negitively charged subatomic particals of matter with electrons.

rutherford's experiment:

1) rutherford's experiment was a gold foil experiment.

2) rutherford's experiment showed atoms which are mostly empty ,which are tiny,dense and those atoms were positively charged.

$\longrightarrow\underline{\underline{\red{\sf{question \: b : }}}}$

b)what is meant by valency of an element ? what is the relationship between the number of valence electrons and valency?

$\longrightarrow\underline{\underline{\red{\sf{solution: }}}}$

1)valency is the combining capacity of an element /atom.

2)relationship between number of valence electrons and valency :

a) the electron which are in the outer part of the shell of the atom are called valence electrons.

b) valency is the combining capacity of atom to attract the other atoms/elements.