Table of Contents
What is matter made of atoms and molecules?
Matter is made up of extremely tiny particles called atoms and molecules. Atoms and molecules make up the three common states of matter on Earth—solids, liquids, and gases. The particles of a liquid are attracted to one another, are in motion, and are able to move past one another.
What happens to atoms and molecules during a fire?
Burning is combustion, the generally exothermic reaction of a compound with oxygen. As the molecules collide they break apart and recombine, releasing energy as they do (if the reaction is exothermic, in an endothermic reaction there would be a net absorption of energy by the reacting system).
What makes the atoms and molecules in the air a mixture?
This invisible substance called air is really a mixture of several gases. Each gas is present in the form of separate, tiny units called molecules. Molecules are much too small to be seen, but they make up for their small size by being present in tremendous numbers.
What type of property is state of matter?
State of matter is a physical property of matter. A given kind of matter has the same chemical makeup and the same chemical properties, regardless of state. Solids have a fixed volume and a fixed shape. Liquids have a fixed volume but take the shape of their container.
How and why does matter change when it burns?
A chemical change, such as burning, is the result of a chemical reaction and will change the structure of the substance. The second is a physical change, such as folding or breaking, this is the result of a physical activity in which the substance atomic structure does not undergo a change but its physical shape will.
How does fire affect molecules?
When the gas is heated (by a flame or spark) and if there is enough oxygen in the atmosphere, the molecules will break apart and reform totally as water and carbon dioxide.
What is the relationship between atoms and molecules?
Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together.
Is air made out of molecules?
The air in our atmosphere is composed of molecules of different gases. The most common gases are nitrogen (78\%), oxygen (about 21\%), and argon (almost 1\%). Other molecules are present in the atmosphere as well, but in very small quantities.
Which of the following is not physical property of matter?
This is a property of a chemical change. Chemical properties are the characteristics of a matter that can be measured or observed only when a matter undergoes a change to become an entirely different kind of matter. Thus, Flammability is not a physical property.