Trott - Physical Science Midterm Review 2022

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). It reflects the number of protons and neutrons in the nucleus.

Front

What is the state of matter with a definite shape and volume?

Back

Solid. Solids have a fixed shape and volume due to closely packed particles.

Front

What tool is used to measure the mass of an object?

Back

Scale/Balanced. A scale or balance is used to determine the mass of an object.

Front

How many valence electrons does an element with 8 valence electrons have?

Back

8 valence electrons. Valence electrons are the outermost electrons that determine an element's chemical properties.

Front

Which group on the periodic table is referred to as the Alkali Earth metals?

Back

Group 2. Alkali Earth metals are found in Group 2 of the periodic table.

Front

What is the definition of a liquid?

Back

A liquid is a state of matter that has a definite volume but takes the shape of its container.

Front

What is the definition of a gas?

Back

A gas is a state of matter that has neither a definite shape nor a definite volume, expanding to fill its container.

Front

What is a Lewis Dot Diagram?

Back

A Lewis Dot Diagram is a representation of an atom's valence electrons using dots around the element's symbol.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically and its bonding behavior.

Front

What is the difference between atomic number and atomic mass?

Back

Atomic number is the number of protons in an atom's nucleus, while atomic mass is the average mass of an element's isotopes.