The big challenge question. Get a calculator. Find the button that says "log" (logarithm)You can work out the pH value of a solution as-1 x (log of the concentration of hydrogen ions)Calculate the pH of a solution which has a hydrogen ion concentration of 0.00794328One or two decimal places will do

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

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