Chemistry Semester Exam Fall 2022

Front

What is the electron configuration for Phosphorus?

Back

1s2 2s2 2p6 3s2 3p3

Front

What is the base unit for luminous intensity?

Back

candela

Front

Who proposed the plum pudding model of the atom?

Back

J.J. Thomson

Front

Identify the equipment used for titration that has a narrow neck and a flat bottom.

Back

Erlenmeyer flask

Front

What is the electron configuration for Zinc?

Back

1s2 2s2 2p6 3s2 3p6 4s2 3d10

Front

What is the atomic number of Phosphorus?

Back

15

Front

What is the definition of luminous intensity?

Back

Luminous intensity is the measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, measured in candelas.

Front

What is the significance of the plum pudding model?

Back

It was one of the first models to describe the structure of the atom, proposing that electrons are embedded in a positively charged 'soup'.

Front

What is the difference between a beaker and an Erlenmeyer flask?

Back

A beaker has a wide mouth and is used for mixing, while an Erlenmeyer flask has a narrow neck and is used for titration and reducing evaporation.

Front

What is the electron configuration for Copper?

Back

1s2 2s2 2p6 3s2 3p6 4s2 3d9