A change in matter that produces new substances with new properties. (2words)
New substances produced in a chemical reaction.
Substances that react together in a chemical reaction.
A system for organizing elements into columns and rows based on their properties. (2words)
Rows in the periodic table.
Columns in the periodic table.
A group of letters and subscript numbers that represent the make-up of a chemical compound. (2words)
An atom that has an electrical charge, either positive or negative.
A compound that forms between a metal and a non-metal after electrons are transferred.
A compound that forms between non-metals as they share electrons.
A subatomic particle found in the nucleus of an atom. It has no charge.
A positively charged subatomic particle found in the nucleus of the atom.
A negatively charged subatomic particle that orbits the nucleus of an atom.
Refers to either the outer orbital of an atom or the electrons found in the outer shell.
A reaction in which two or more reactants combine to produce a new product.
A reaction in which one compound breaks down into two or more simpler compounds.
A reaction in which one element takes the place of another element in a compound. (2words)
A reaction in which the metal ions of two different compounds exchange places. (2words)
The smallest unit of an element.
A compound that tastes sour, corrodes metal and tissue, and turns blue litmus paper red.
A substance that changes colour when added to an acid or a base.
A compound that tastes bitter, feels slippery, corrodes tissue, and turns red litmus paper blue.
The number in front of a product or reactant in a balanced chemical equation.
Ability to conduct (transfer) electricity.
Law describing the fact that the total mass and number of atoms is the same before and after a reaction. (3words)
A reaction between an acid and a base that produces salt and water.
Elements on the left side of the periodic table. They are malleable, shiny, conductive, and solid at room temperature.
Elements on the right side of the periodic table. They are not malleable, not conductive, and exist in a number of states at room temperature.
A pure substance that cannot be broken down.
A pure substance that contains two or more different elements.
A particle with a positive charge
A particle with no charge
A particle with a negtive charge
Atoms with the same number of protons, but different number of neutrons
The number of protons in the nucleus
The number of protons and neutrons in an atom
A material that has shininess, conductivity, magnetism, malleability, and ductility
Ability to transfer heat or electricity
Ability to be pulled into wires
Ability to be hammered into shapes
An element that lacks the characteristics of a metal
An element intermediate in properties of a metal and non metal
the first element on the periodic table
Not discovered in nature, but artificially produced isotopes
What hydrogen and helium would make, if combined
The 14th element on the periodic table
Electrons in the outermost shell of an atom that are used for chemical bonds
Made up of atoms, and defined nthe number of protons in the nucleus
the 8th element on the periodic table
What lithium and helium make when combined
Negative charge of an atom
Center part of an atom that holds protons and neutrons
Positive charge of an atom
Neutral Charge of an atom
Area in an atom where an electron is found
Substance that cannot be broken down into smaller parts
Number or protons in an atom
Atoms of the same element that have different amounts of neutrons
Average mass of an element's isotopes
Chart that shows the elements
When 2 or more elements combine
Atom that is no longer neutral because of gained/lost electrons
Chemical bond by sharing of valence electrons
Chemical Reaction that releases energy
Chemical reaction that absorbs energy
Substance that speeds up a chemical reaction
Symbol for Iron
Vertical columns on the Periodic Table are called
Horizontal rows on the Periodic Table are called
A particle with a single negative charge
The positively charged central part of an atom
A positively charged particles that make up a nucleus
A nuetral particle in the nucleus of an atom
The electrons in the outermost energy level of Niels Bohr's model of an atom
An area around an atomic nucleus where an electron is most likely to be found
Pure substances that cannot be broken down into any simpler substances
The number of protons in an atom of an element
Atoms of the same element that have different numbers of neutrons
The sum of the number of protons and neutrons in an atom
The average mass of an element's isotopes
A chart of elements arranged into rows and columns based on their chemical and physical properties
Vertical columns on the periodic table
Horizontal rows on a Periodic Table
A group located on the left side of the Periodic Table that is a good conductor and shine when polished
Another group located on the right side of the Periodic Table that are insulators and are not shiny
An object that has low electrical resistance and can allow electricity to flow easily
An object that has higher electrical resistance and prevents electricity easily through a material
Elements in the middle of the Periodic Table and are semiconductors.They also have properties that are similar to both metals and nonmetals
A substance that is made of two or more elements chemically joined in a specific combination
An atom no longer neutrally charged because it has lost electrons
An attraction that holds ions close together
A bond formed when two atoms share valence electrons
A chemical reaction that releases heat of light energy
Chemical Reactions that absorb energy
The speed at which a reaction occurs
A substance that speeds up chemical reactions
a substance that cannot be broken down into a simpler substance by ordinary chemical means
the smallest unit of an element that has all of the properties of the element; basic building block of matter.
the number of protons and neutrons in the nucleus of one atom of the element.
the number of protons contained in each nucleus of its atoms of the element.
a horizontal row (left to right) in the periodic table.
a vertical column (up and down) on the periodic table.
a chart that organizes information about all of the known elements according to their atomic number.
describes how likely an element is to form bonds with other elements.
an element or substance that conducts heat and electricity, is malleable and ductile and has low ionization energy and low electronegativity values. Metals
an element that does not conduct electricity or heat and is usually a gas at room temperature. Nonmetals are brittle, have high ionization energies and high electronegativity values. Nonmetals tend to gain electrons to form anions
group 1 metals on the periodic table that contain 1 valence electron and lose their valence electrons the most easily, making them the most reactive metals.
group 1 metals on the periodic table that contain 2 valence electrons and are the second most reactive metals.
group 3-12 on the periodic table. They have varying valence electrons and do not follow the normal trends of the other metals. They form brightly colored compounds and ions in solution.
group 17 nonmetals on the periodic table that contain 7 valence electrons. They only need to gain 1 valence electron to have a stable octet. They gain valence electrons the most readily, making them the most reactive nonmetals.
group 18 elements on the periodic table that contain 8 valence electrons (He has 2) and a full valence shell making them very stable and inert.
an element that has some properties of a metal and some properties of a nonmetal. The metalloids are found on the boron staircase, there are 7 metalloids: B, Si, Ge, As, Sb, Te, and Po.
elements and/or compounds that when put together are unable to react chemically. The noble gases (group 18) elements are inert because of a full valence shell.
the charge of an atoms nucleus resulting from its number of protons
the distance between the nucleus of an atom and it's outermost energy level
the attraction a nucleus has resulting from its number of protons
anything that has mass and occupies space
Chemistry/study of the composition of
Scientific Method/includes seven steps to solve a
Expirement/procedure used to test a
Theory/a well-tesyed explanation for a broad set
Metals/goid conductors of heat and
Non-metals/bad conductirs of
Valence Electrons/electrons in the highest occupied energy level of an elements
Chemical Formula/shows the kinds and numbers if atoms in the smalleat representation unit of a
Molecule/neutral grouos of atoms joined together by covalent
Atoms/smallest component of a
Alkaline Earth Metals/six chemical elements in column (group) 2 of the Periodic
representation of what elements a compound contains and the exact number of the atoms of each elements in a unit of the compound
a change in which one or more substances are converted into new substances while energy is released or absorbed
a way to describe a chemical reaction using chemical formulas and other symbols
the chemicals presented before a reaction
the new chemicals presented after a reaction
a number that represents the number of units of each chemical taking part in a reaction
means "written below"
the amount of valence electrons gained or lost between metals and nonmetals to become stable
when water is the solvent for a reaction
an insoluble compound that comes out of solution during a double-displacement reaction
a chemical reaction that absorbs energy primarily in the form of heat
a reaction in which the energy released is in the form of heat
a reaction that occurs when a substance reacts with oxygen to release energy in the form of heat and light
a chemical reaction in which two or more substances combine to form another substance
a chemical reaction in which one substance breaks down into two or more substances
a chemical reaction in which one element replaces another element in a compound
a chemical reaction in which the positive ion of one compound replaces the positive ion of another compound
What are positively charged particles of the atom?
What are negatively charged particles of an atom?
What particle of anatom has no charge?
Where are protons found?
Where are electrons found?
An _______ is an atom that has the same number of protons but a different number of neutrons as other atoms of the same element.
The ____ ______ is the total number of protons and neutrons.
What detrmines the identity of an atom?
What is an average of the masses of all naturally occuring isotopes of an element?
The electrons in the outermost energy level of an atom are called _______ _________.
Alkali Metals only have ___ valence electron?
Valence electrons determine the _____ of which an element si placed.
Lithium is a?
Is Flourine a metal or nonmetal?
A ______ loses an electron and becomes positively charged.
A _____ gains an electron and becomes negatively charged.
A row of elements is called a ______.
What are charged particles that form during chemical changes?
What is it called when 2 atoms of nonmetals bond?
What is it called when a metal reacts with a nonmetal?