What is the definition of chemistry?
Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.
What type of science is chemistry Brainly?
Chemistry is the science of matter and its changes that occur. Everything in our universe is made up of matter and it has to have mass and take up space to be considered this.
What does law say about matter?
Both the initial and final substances are composed of atoms because all matter is composed of atoms. According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.
Why energy Cannot destroyed?
The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another.
Can we destroy matter?
Matter is anything that has mass and takes up space. Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
Can black holes destroy matter?
General relativity says that when matter falls into a black hole, information is destroyed, but quantum mechanics says firmly it can’t be. A unified theory requires us to somehow reconcile the two, probably by reimagining space-time as only an approximate thing.
Can we destroy an electron?
Electrons (and other particles) can be destroyed by a process known as pair annihilation. A positron is the opposite of the electron, it has positive charge and identical rest mass. If a positron and an electron unite, they annihilate each other and release energy in the form of radiant energy, e.g. photons.
How does the electron work?
The electrons move from negatively charged parts to positively charged ones. The negatively charged pieces of any circuit have extra electrons, while the positively charged pieces want more electrons. The electrons then jump from one area to another. When the electrons move, the current can flow through the system.
How fast does an electron move?
about 2,200 kilometers per second
What is the force that makes electrons move?
electromotive force
What are three sources of EMF?
Primary sources of electromotive force include friction, light, chemical reaction, heat, pressure, and mechanical-magnetic action.