Physical Science - Chemistry Review

Front

In an ionic bond, electrons are ________. In a covalent bond, electrons are _______.

Back

In an ionic bond, electrons are transferred. In a covalent bond, electrons are shared.

Front

This law states that mass cannot be created or destroyed (during a chemical reaction), only transformed.

Back

The Law of Conservation of Mass.

Front

Describe the pH level of neutral substances.

Back

The pH level of neutral substances is 7.0.

Front

An element has 15 protons. What is that element?

Back

The element is phosphorus.

Front

What happens to temperature during melting?

Back

Temperature remains constant during melting.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

Define a chemical reaction.

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

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 significance of the pH scale?

Back

The pH scale measures how acidic or basic a substance is, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.