Describe the arrangement of metals in the periodic table in
terms of their properties.
what does that mean ?

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?

Which of the following is true about the speed of light? it depends on the wavelength.

Why is any chemical reaction always balanced? give reasons and explain the easiest way to solve the balancing problems in chemical equations with stoichiometric coefficients upto 20 as hit and trial doesn't always work. give full reasoning