Science Final Review

Front

How do you determine the number of protons, neutrons, and electrons an element has based on the periodic table? Which ones are always the same number?

Back

Protons and electrons are always the same number.

Front

Which of the following pH values represents a base?

Back

8.1

Front

What are valence electrons?

Back

The number of electrons in the outermost shell.

Front

What is the difference between a concentrated and dilute solution? Give an example of each.

Back

A concentrated solution has more solute than solvent, while a dilute solution has more solvent than solute. Example: Concentrated - strong coffee, Dilute - weak tea.

Front

The category that contains the most stars is...

Back

Main Sequence.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

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 together.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

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

Front

What is the pH scale?

Back

A scale used to measure how acidic or basic a solution is, ranging from 0 (acidic) to 14 (basic).