Structure 1. Models of the particulate nature of matter

M25-CHEM-HL-TZ1-P1B-Q2

A student was given a mixture to separate and collect the individual components. The mixture contained sand, \( SiO_2(s) \),

What is the electron configuration of an atom of Cu?

What is the relative atomic mass of an element with a mass spectrum showing a peak at \( m/z =

What is the maximum number of electrons that can occupy the fourth main energy level of an atom?

What is a possible empirical formula for a substance with \( M_r = 58 \)? I. \( C_2H_5 \) II.

How many oxygen atoms are present in \( 0.0200 \, mol \) of \( CuSO_4 \cdot 5H_2O \)?

What is the electron configuration of the \( Cr^{2+} \) ion?

What is the empirical formula of a compound with the following composition by mass? \( C=37.5\% \) \( H=12.5\% \)

A test tube contains a mixture of liquid hydrocarbons. What is the type of mixture and the best method of

Which property is the same for water containing tritium (\( ^3H \)) and water containing hydrogen (\( ^1H \))?