Chemistry Final Exam Semester 1 (Dec 2024)

Front

What is the total mass measured when using a scale for a solid and its container?

Back

The total mass of solid + container.

Front

Are all molecules compounds?

Back

No, not all molecules are compounds.

Front

How many electrons can the 2nd energy level hold?

Back

8 electrons.

Front

What state of matter is described between letters C and D if it is a liquid?

Back

Liquid.

Front

What does the atomic number represent in an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the definition of a compound?

Back

A substance formed when two or more elements are chemically bonded together.

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 made of two or more different types of atoms chemically bonded.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

What is the role of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and stabilize the nucleus.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.