Science Flashcards
(45 cards)
The organized study of the composition and interaction of matter
Chemistry
Name of a substance composed of a single type of atom
Element
term of substances composed of more than one type of atom linked together
Compound
British Chemist and Christian, he proposed the atomic theory of matter
John Dalton
The foundation of the understanding of matter
Atomic theory of matter
Group of atoms linked together by chemical bonds to form a distinct unit
Molecules
what determines an element’s atomic number
The amount of protons and electrons in the nucleus
Extremely small particles that make up all matter
Atoms
What composes of an atom
Subatomic particles - Protons, Neutrons, and Electrons
What is the dense central core of an atom
Nucleus
What are atoms that are the same element but have a different amount of Neutrons
Isotope
An atom that has an electrical charge because of losing or gaining electrons
Ion
Two types of Ions
Anion -Negative
Cation -Positive
Layers in an atom that hold a certain number of electrons
electron shell
what is an atom’s outer shell that contains electrons called
valence shell
A russian chemist who developed the periodic law and periodic table
Dimitri Mendeleev
Typically hard, dense, and shiny solids that are good conductor for heat and electricity and have high melting points
metals
Typically poor conductors of heat and electricity
Nonmetals
Are all solids that have properties intermediate between metals and nonmetal
Semimetals
The most abundant alkaline earth metal
Compounds of Calcium
Main branches of Chemistry
Organic Chemistry, Inorganic Chemistry, Physical Chemistry, Biochemistry, and Analytical chemistry
A form of the mineral magnetite, was observed to have attractive properties as early as the time of Thales of Miletus, an example of a natural magn
Lodestone
An object capable of attracting materials such as iron or steel by magnetic force
Magnet
It states that unlike poles attract each other, but like poles repel each other
Law of magnetic Poles
