Section 1
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Reactant
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Last updated
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Date created
Mar 14, 2020
Cards (61)
Section 1
(50 cards)
Reactant
A chemical substance that is present at the start of a chemical reaction
Alkaline Earth Metals (Group 2)
metallic elements in group 2 of the periodic table which are harder than the group 1 alkali metals but also less reactive than
pH Scale
scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution; a pH of 0 to 7 is acidic, a pH of 7 is neutral, and a pH of 7 to 14 is basic
heterogeneous mixture
A mixture that is not the same in composition; components are not evenly distributed throughout the mixture
Chemical Symbol
A one or two letter representation of an element
Element
A pure substance that cannot be broken down chemically into simple kinds of matter
Periodic Table
an arrangement of elements in which the elements are separated into groups based on a set of repeating properties
Matter
What everything is composed of
Transition Metals (Groups 3-12)
Good thermal conductors, shiny, electric conductors, higher density and melting points than group 1+2, 1-2 valence electrons
Mixture
A combination of two or more substances that are not chemically combined
Sifting
a process used to separate the parts of a mixture by particle size
Reactivity
How readily a substance combines chemically with other substances.
Halogens (Group 17)
Very reactive non-metals. Atoms of this group have seven electrons in their outer level. Also known for forming salts.
Chemical Formula
A combination of chemical symbols and numbers to represent a substance
A compound
What is a pure substance made up of two or more elements?
Atomic mass
What do you find by adding the number of protons and neutrons together?
Surface Tension
A measure of how difficult it is to stretch or break the surface of a liquid
pH Value of &
Substance that is neutral, it's not an acid or base
Solution
What is a mixture where 2 or more substances are uniformly distributed in another substance?
Neutron
A subatomic particle that has no charge and that is found in the nucleus of an atom
Filtration
A process that separates materials based on the size of their particles.
Cohesion
an attraction between molecules of the same substance
Concentration
A measurement of how much solute exists within a certain volume of solvent
Non-Metals
Low conductivity, not ductile, not malleable, brittle, dull, gas at room temp
Solute
___________ is the substance dissolved in the solution.
Solvent
___________ is the substance in which the solute is dissolved
Number of protons
What is the atomic number of an element?
Period
A horizontal row of elements in the periodic table
Atom
The simplest particle of an element
Noble Gases (Group 18)
Elements in group 18 that have a full 8 electrons in the outer energy shell and, therefore, are stable and tend not to form chemical bonds. Least reactive elements on Periodic Table
A molecule
_________ is the simplest part of a substance that still has all of the properties of that substance.
Valence Electron
Electrons on the outermost energy level of an atom
energy level
a region of an atom in which electrons of the same energy are likely to be found
Alkali Metals (Group 1)
Group 1 on the periodic table. 1) Soft metals 2) Reacts quickly with oxygen 3) Reacts violently with water 4) Most reactive group on Periodic Table
Group
Vertical column in the periodic table
Metals
Elements that are good conductors of electric current and heat.
homogenous mixture (solution)
a mixture that is the same in its properties throughout given samples
Water
What is the universal solvent?
catalyst
substance that speeds up the rate of a chemical reaction
Mettalloids
elements with some of the properties of metals and some of the properties of non-metals. Found along the zig zag line
Product
A substance produced in a chemical reaction
Electron
A subatomic particle that has a negative charge
Chemical Property
A characteristic of a pure substance that describes its ability to change into different substances
The Yield of a Chemical Reaction is how much you actually made
Physical Change
A change in a substance that does not involve a change in the identity of the substance
Proton
A subatomic particle that has a positive charge and that is found in the nucleus of an atom
Chemical Change
A change in matter that produces one or more new substances
Physical Property
A characteristic of a pure substance that can be observed without changing it into another substance
Subscript
A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
Coefficient
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
Section 2
(11 cards)