Includes anything that has mass
Matter
Describes the ability to work
Energy
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Includes anything that has mass
Matter
Describes the ability to work
Energy
Distinguishing characteristics that we use to identify different samples of matter
Properties
Two types of properties
Physical and Chemical properties
The amount of space that a substance or object occupies
Volume
_______ and ______ believed that nature is consisted of two things
Leucippus and Democritus
Who said that ‘‘atoms are indestructible and completely full’’
Democritus
A greek word which means indivisible particle
Atomos
Who said that all matters as being composed of four basic elements; Fire,Earth,Water, and Wind
Aristotle
Who presented the concrete evidence that all matter is made of very small particles called atoms?
John Dalton
The smallest particle of an element that has all properties of an element
Atoms
Particle that consist two or more atoms combined together
Molecule
The temperature of a liquid at which it change to steam or vapor
Boiling pont
The process of turning from liquid into gas
Evaporation
gaseous form of water
Water vapor
The process where gas change into liquid
Condensation
The temperature at which it changes state from solid to liquid
Melting point
The process where a solid change into liquid
Melting
The process where liquid is changed into solid
Freezing
A way of describing how tighly a substance is, how close together its molecules and atoms are, or how mycg mass is in a given volume
Density
A measure of density relative to the density of a reference substance.This reference material could be anything, but the most common reference is pure water
Specific gravity
The common reference material of a specific gravity
Pure water
1 type of chemical compound. It is separated and created chemically and has a fixed ratio.
Pure substance
2 or more different substances. it can be separated and combined physically and has an indefinite ratio
Mixture
The total number of protons and neutrons in the nucleus
Mass number
Equal to the number of protons in tge nucleus,as well as the number of electrons in the electron cloud
Atomic Number
This is equivalent to the number of protons and neutrons in the atom
Atomic mass
An atom that carries an electrical charge is called an?
Ion
A positively charged ion is called
Cation
A negatively charged ion is called
Anion
A change from one state to another
Phase change
Phase change from solid to liquid
Melting
Phaee change from liquid to gas
Vaporization
Phase change from solid to gas
Sublimation
Two classification of phase change
Endothermic and Exothermic
The object absorbs energy from the surroundings
Endothermic
The object releasee energy to the surroundings
Exothermic
It defines the identitiy of the element and determines its position in the periodic table
Atomic number
Name the three subatomic particles
Proton,Neutron,Electrons
Who discovered protons and what year is it discovered.
Ernest Rutherford 1919
Who discovered Neutrons and what year
James Chadwick 1932
Who discovered electrons and what year
John Joseph Thompson 1897
The pull between positive and negative electrons is called
Electric Force
Subatomic particlenthhat defines the identitiy of an element
Protons