Chemistry S1 2024 Review

Front

What are chemical properties?

Back

Chemical properties are characteristics of a substance that can only be observed when it undergoes a chemical change, such as flammability, reactivity, and acidity.

Front

What are physical properties?

Back

Physical properties are characteristics of a substance that can be observed without changing its chemical identity, such as color, hardness, and melting point.

Front

How many electrons can the first energy level hold?

Back

The first energy level can hold a maximum of 2 electrons.

Front

What is the electron configuration for Magnesium?

Back

The electron configuration for Magnesium is 1s² 2s² 2p⁶ 3s².

Front

What is an example of a chemical property?

Back

An example of a chemical property is flammability.

Front

What is the formula for density?

Back

The formula for density is density = mass / volume.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically 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; it is conserved.

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is a chemical reaction?

Back

A chemical reaction is a process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.