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The number of trends, which are true wit...

The number of trends, which are true with respect to the properties of hydrides of oxygen family:
1) Bond angle:
`H _(2) O gt H _(2) S gt H _(2) Se gt H _(2) Te `
2) Volatility :
`H _(2) O lt H _(2) S gt H _(2) Se gt H _(2) Te `
3) Thermal stability:
`H _(2) O gt H _(2)S gt H _(2) Se gt H _(2) Te`
4) Acidic strength :
`H _(2) O gt H _(2) S gt H _(2) Se gtH _(2) Te `

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