How do chemists classify substances?
A.
as reactive or inert
B.
as acids or bases
C.
as spades or diamonds
D.
as nuclear or atomic
B. as acids or bases.
What example BEST demonstrates acceleration?
A.
a spaceship, after takeoff, flying toward Mars
B.
a bullet slowing down the further it travels
C.
a satellite orbiting the earth
D.
a lily pad floating on a lake
A. a spaceship, after takeoff, flying toward Mars.
What is an example of inertia?
A.
an asteroid flying through the vacuum of space
B.
a bullet striking a hard surface
C.
a plane taking off from the runway
D.
catching a softball in a catcher’s mitt
A. an asteroid flying through the vacuum of space.
Chemists classify substances based on various characteristics and properties. The most common methods used to classify substances in chemistry are based on their chemical reactivity, acidity or basicity, and atomic structure.
A. Chemists classify substances as reactive or inert:
Chemical reactivity refers to how likely a substance is to undergo a chemical reaction. Substances that readily react with other substances are classified as reactive, while those that do not react easily are classified as inert.
B. Chemists classify substances as acids or bases:
Acidity and basicity are important properties of substances. Acids are substances that can donate protons (H+ ions) when dissolved in water, while bases are substances that can accept protons. The classification of substances as acids or bases is based on their ability to participate in acid-base reactions.
C. Chemists do not classify substances as spades or diamonds:
Chemists do not use the classification of spades or diamonds to categorize substances. This classification is more relevant to playing cards or the field of gemology, rather than chemistry.
D. Chemists classify substances as nuclear or atomic:
This classification is not commonly used in chemistry. Instead, chemists focus more on the arrangement of electrons and the behavior of the atoms or molecules in chemical reactions. The study of nuclear reactions and radioactive substances falls under a separate branch of science known as nuclear chemistry.
In summary, the most relevant classifications used by chemists are based on the reactivity of substances (reactive or inert) and their acidity or basicity (acids or bases).