H Chem Fall 2024 Semester Exam

Front

Which periodic group has the smallest atomic radius?

Back

Noble Gases have the smallest atomic radius due to their complete valence shell, resulting in a stronger attraction between the nucleus and the outermost electrons.

Front

What is a row of elements on the periodic table called?

Back

A row of elements on the periodic table is called a period.

Front

What did John Dalton state about atoms?

Back

John Dalton stated that elements are made of atoms, atoms of a given element are identical, and atoms cannot be subdivided, created, nor destroyed.

Front

What term is used for a substance that can flow?

Back

A substance that can flow is referred to as a Fluid.

Front

What is the name of the process in which a liquid changes to a gas at a temperature below its boiling point?

Back

The process in which a liquid changes to a gas at a temperature below its boiling point is called Evaporation.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.