Regents Chemistry 2

Question 1

Which subatomic particle determines the identity of an element?

Accepted Answer

Number of protons

Answer

The number of protons (atomic number) uniquely identifies each element.

Question 2

What type of bond forms when one atom transfers electrons to another?

Accepted Answer

Ionic bond

Answer

Ionic bonds result from the transfer of electrons from a metal to a nonmetal, creating oppositely charged ions.

Question 3

A solution with a pH of 3 is best described as:

Accepted Answer

Strongly acidic

Answer

pH 3 is far below 7 (neutral), indicating a strongly acidic solution with a high concentration of H⁺ ions.

Question 4

During electrolysis of water, which gas is produced at the cathode?

Accepted Answer

Hydrogen

Answer

At the cathode (negative electrode), reduction occurs, producing hydrogen gas (H₂).

Question 5

Which type of radiation has the greatest penetrating power?

Accepted Answer

Gamma (γ)

Answer

Gamma rays are high-energy electromagnetic radiation with the greatest penetrating power, requiring thick lead or concrete to block.

Regents Practice Test