Vocabulary Periodic Table Flashcards
(53 cards)
Atomic Mass?
The total number of protons and neutrons in an atom.
Metals?
Elements that are usually shiny, conduct heat and electricity, and can be shaped or stretched.
Non-metals?
Elements that are generally dull, brittle, and poor conductors of heat and electricity.
Transition Metals?
Metals found in the center of the periodic table, known for their variable oxidation states and catalytic properties.
Reactivity?
How easily an element reacts with other substances.
Electron Shells?
The regions around the nucleus of an atom where electrons are found.
Group 1 (alkali metals)?
A group of very reactive metals, including lithium, sodium, and potassium, that react with water to form alkaline solutions.
Group 7 (halogens)?
A group of reactive non-metals, including fluorine, chlorine, and iodine, that form salts when they react with metals.
(noble gases)?
A group of very unreactive gases, including helium, neon, and argon, with full outer electron shells.
Trend ?
A pattern or regular change in properties observed across a group or period in the periodic table.
Displacement Reaction?
A reaction in which a more reactive element takes the place of a less reactive element in a compound.
Oxidation?
A reaction where a substance gains oxygen or loses electrons.
Metal Oxide?
A compound formed when a metal reacts with oxygen.
Oxygen Test?
A test for oxygen gas; the splint relights in the presence of oxygen.
Hydrogen Test?
Test for hydrogen; a lit splint goes out with a squeaky pop in the presence of hydrogen.
Element
A pure substance made of only one type of atom
Compound
A substance made when 2 different atoms chemically bond together
Mixture
A combination of 2 or more substances that are nor chemically bonded and can be separated
Molecule
Two or more atoms chemically bonded together
Chemical formula
A way of representing a compound using symbols and numbers
Chemical bond
A force that holds atoms together in a compound
Physical change
A change in the state or appearance of a substance without forming new substances
Chemical change
A reaction that produces one or more new substances
Separation techniques
