Scientists are trying to synthesise a new element with proton number 119. The element is predicted to be a Group 1 element in Period 8 of the Periodic Table. Which predictions are likely to be correct about this element? 1 The outermost occupied orbital of one atom of this element will be an s orbital. 2 The atomic radius will be the largest of the seven elements in Group 1. 3 It will have a greater first ionisation energy than element 118.

A sample containing x mol of Al₂Cl₆ is dissolved in water to give solution W. In order to precipitate all of the alum…

The first ionisation energy of potassium, K, is 418 kJ mol⁻¹. The first ionisation energy of strontium, Sr, is 548 kJ…

A student investigated the chloride of a Period 3 element. This is what the student wrote down as a record. "The comp…

Alcohols, aldehydes and nitriles can each be converted into carboxylic acids. Which descriptions of their conversions…

How many structural isomers with the molecular formula C₄H₁₀O give infra-red absorptions both at approximately 1200 c…

Compound Q contains 40% carbon by mass. What could Q be? 1 glucose, C₆H₁₂O₆ 2 starch, (C₆H₁₀O₅)n 3 sucrose, C₁₂H₂₂O₁₁