2nd 9 Weeks Assessment Review

Front

What is the name of Ca₃(PO₄)₂?

Back

Calcium phosphate.

Front

What is the correct electron configuration for Chlorine (Cl)?

Back

1s² 2s² 2p⁶ 3s² 3p⁵.

Front

What experiment did JJ Thomson use to discover the electron?

Back

Cathode ray tube experiment.

Front

What is the name of Na₂S?

Back

Sodium sulfide.

Front

Who proposed a model with electrons moving in specific layers?

Back

Bohr.

Front

What is the atomic number of Chlorine (Cl)?

Back

17.

Front

What is the charge of a sodium ion (Na⁺)?

Back

+1.

Front

What is the formula for calculating the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the principle behind the gold foil experiment?

Back

It demonstrated that atoms have a small, dense nucleus.

Front

What is the significance of the cathode ray tube experiment?

Back

It led to the discovery of the electron.