Atoms are made up of three subatomic particles called protons, neutrons, and electrons. Protons are positively charged particles, neutrons are neutrally charged particles and electrons are negatively charged particles. In the nucleus it is made up of protons and neutrons and outside of the nucleus is the electron cloud. The electron cloud has a radius 10,000 greater than the nucleus. Protons and the neutrons are heavier than electrons and reside in the center of the atom. The nucleus is held together by strong force holds the atoms together. The weak force can change a neutron to a proton and a neutrino to an electron. Another force is the Electrostatic force is when atoms trade electrons and keep them from rooming out of the electron cloud and it makes a magnetic force. The physical properties of matter are solids, liquids, gases, and plasmas. Solids are formed when the attractive forces between the individual molecules are greater than the energy causing them …show more content…
A NEGATIVELY-buoyant item, or a body that will sink in a fluid: even with the buoyant force pushing the body up (which it always does), a negatively buoyant mass will have the force of gravity pull the body downward until it reaches a solid surface below it, such as the floor. A POSITIVELY buoyant item, or an item whose buoyant force is so great that it can push a body upward and fight the pull of gravity: and when this type of buoyancy exists, it can be said that the body is floating. A POSITIVELY buoyant item, or an item whose buoyant force is so great that it can push a body upward and fight the pull of gravity: when this type of buoyancy exists, it can be said that the body is floating. Density is the measure of mass/ volume; density of water is 1g/mL. If something is denser then the surrounding fluid it sinks. If something is less dense then the surrounding fluid it fluid it
Archimedes principle says that the magnitude of the buoyant force always equals the weight of the fluid displaced by the object. This buoyant force always acts upward through the point that was the center of gravity of the displaced fluid. In the case of floating objects the buoyant force is equal to the force of gravity on the object. Knowing that the change in pressure is equal to the Buoyant force per unit area (ΔP = B/A) we see that B = (ΔP)A and ΔP = ρgH where ρ is the density of the fluid g is the acceleration due to gravity and H is the height of the fluid displaced.
Archimedes Principle: Any object wholly or partly immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by the object.
An atom, by definition, is the smallest part of any substance. The atom has three main components that make it up: protons, neutrons, and electrons. The protons and neutrons are within the nucleus in the center of the atom. The electrons revolve around the nucleus in many orbitals. These orbitals consist of many different shapes, including circular, spiral, and many others. Protons are positively charged and electrons are negatively charged. Protons and electrons both have charge of equal magnitude (i.e. 1.602x10-19 coulombs). Neutrons have a neutral charge, and they, along with protons, are the majority of mass in an atom. Electron mass, though, is negligible. When an atom has a neutral charge, it is stable.
Every chemical element or compound have specific properties that make them different than the other. However, these properties help us to understand every element or compound in which they can be used and how we can deal with them. These properties can be chemical properties which are defined as "that property must lead to a change in the substances ' chemical structure", such as heat of combustion and flammability ("Physical and Chemical…"). Also, these properties can be physical properties which are defined as the properties "that can be measured or observed without changing the chemical nature of the substance", such as mass, volume, boiling and freezing points ("Physical and Chemical…"). These two properties are related to each other. For
In "Energy Story" the article tells you about the makeup of an atom and the type of things that the different numbers of protons, neutrons, and electrons do and make. This article is very informative like the others, but in a different way. In this article the main focus is on the buildup of an atom.
In 1911, Ernest Rutherford found a very spectacular in such a small thing. Rutherford found that an atom has a microscopic charged nucleus. Empty space surrounds the nucleus. The nucleus is also surrounded by electrons. By this discovery Rutherford made the model of the atom.
A physical property is a property that does not change the chemical nature of that substance. Examples of physical properties are color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density A chemical property is a property is a that does change the chemical nature of that substance. Some examples are heat of combustion, reactivity with water, PH, and electromotive force.
Substances are those things that have properties; for example, tables and persons are substances that have properties such as being round or six feet tall. Events are particular substances having particular properties at particular time. Material substances, he writes, are those that occupy space; immaterial ones do not. Events and properties may be physical or mental.
Matter exists in three basic states: solid, liquid, or gas. A substance experiences a phase change when the physical characteristics of that substance change from one state to another state. Perhaps the most recognizable examples of phase changes are those changes from a solid to a liquid or a liquid to a gas. When a substance goes through a phase change, there is a change in the internal energy of the substance but not the temperature of the substance (Serway, et al. 611).
For one thing, matter is anything that takes up space, and it is composed of miniscule particles called atoms. Different types of matter can be categorized in two sections: composition and properties. The physical properties can be observed or measured without changing the composition of matter, and in physical change, there are two properties, extensive and
There are several characteristics that water possesses that are essential to life on Earth. Four of them are cohesion and adhesion, ability to moderate temperature, expansion upon freezing, and versatility as a solvent. The first part, cohesion, is the attraction between molecules of the same kind. Water molecules have strong cohesive behavior because they have the ability to form hydrogen bonds with each other. Cohesive behavior is what is responsible for surface tension, which is when stress or tension is placed upon a liquid’s surface and it resists rupture. This occurs because water molecules on the surface will form hydrogen bonds with their neighbors, the same as the other water molecules further within the liquid. The molecules on the surface however, since the are exposed to the air on one side will have fewer neighboring water molecules available to bond with. Therefore, they will form stronger bonds with the neighbors that are available. Surface tension is responsible for allowing insects to walk across the top of water and mate and feed
Since the days of Aristotle, all substances have been classified into one of three physical states. A substance having a fixed volume and shape is a solid. A substance, which has a fixed volume but not a fixed shape, is a liquid; liquids assume the shape of their container but do not necessarily fill it. A substance having neither a fixed shape nor a fixed volume is a gas; gases assume both the shape and the volume of their container. The structures of gases, and their behavior, are simpler than the structures and behavior of the two condensed phases, the solids and the liquids
The definition of buoyancy is “the ability or tendency to float in water, air or some other fluid”. Buoyancy It tells you about the ability of an object to float on the water or liquid. You can determine whether an object will float or sink, not by checking the relation between the weight of the water and the weight of the object. People use buoyancy all the time, it is used to create a water object. Such as boating and scuba diving. If you think about it like this when you are on the top of the ocean or lake or river. It is called Positive Buoyancy. When you are in the middle of the ocean or lake it is called Neutral Buoyancy. And when you are in the bottom of the ocean it is called Negative Buoyancy. The positive buoyancy is seen when an object floats in the
Since atoms are made up of protons and electrons most atoms should collapse into themselves or other atoms, since positive charges and negative charges attract each other together like a magnet.