Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms.

number of principal energy levels.

Compared to the charge and mass of a proton, an electron has...

An opposite charge and a smaller mass.

The same charge and a smaller mass.

The same charge and the same mass.

An opposite charge and the same mass.

When a metal atom combines with a nonmetal atom, the nonmetal atom will...

gain electrons and increase in size.

lose electrons and decrease in size.

lose electrons and increase in size.

gain electrons and decrease in size.

Which statement correctly describes the properties of sodium chloride (NaCl) when it is dissolved in water?

NaCl molecules are separated into Na⁺ ions and Cl⁻ ions in the solution.

NaCl retains its crystalline structure in the solution.

NaCl molecules are separated into Na and Cl atoms in the solution.

NaCl increases the pH of the solution, making it more acidic.

Chemistry Regents Exam Practice Test

Chemistry

Regents

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