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Section 1

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Chemical Change

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Chemistry Science

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Date created

Mar 1, 2020

Cards (45)

Section 1

(45 cards)

Chemical Change

Front

A change in which new substances with new chemical and physical properties are formed

Back

Physical Change

Front

A change that affects the form of a substance but does not create a new substance.

Back

Non-metal

Front

An element that is usually a gas or brittle solid (easily breakable) and is a poor conductor of heat and electricity found on the right side of the periodic table

Back

Family (Group)

Front

Elements in the same vertical column of the periodic table; also called a group

Back

Element

Front

A substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number

Back

Atomic Number

Front

The order of an element in Mendeleyev's table of the elements, the number of protons in the nucleus of an atom

Back

Orbital

Front

A region of space around the nucleus where an electron is likely to be found.

Back

Proton

Front

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

Back

Atom

Front

The basic unit of matter; smallest part of an element

Back

Metalloid

Front

An element with properties of both metals and nonmetals located along the stair-step line on the right side of the periodic table.

Back

Transition Metals

Front

Groups 3-12, 1-2 electrons in the outer energy level, less reactive than alkali-earth metals, shiny, good conductor of thermal energy and electrical current, high density

Back

Matter

Front

Anything that occupies space and has mass

Back

Malleable

Front

Capable of being shaped by hammering or pressing

Back

Chemical Equation

Front

A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.

Back

Bromine

Front

A dark reddish-brown, non-metallic liquid element with a suffocating odor.

Back

Gas

Front

A state of matter with no definite shape or volume

Back

Halogens

Front

Contains nonmetals, 7 valence electrons in it's outermost energy level. Very reactive

Back

Product

Front

A chemical substance formed as a result of a chemical reaction found on the right side of the arrow

Back

Noble Gases

Front

Elements in group 8A of the periodic table. Have no charge and are gases under normal conditions. (Helium, Neon, Argon, Krypton, Xenon, Radon)

Back

Mercury

Front

What transition element is a liquid at Room Temperature?

Back

Conductivity

Front

The ability of a material to allow either heat or electricity to flow through it.

Back

Period

Front

The horizontal rows of elements in the periodic table that contain elements with the same number of energy levels

Back

Atomic Mass

Front

The weighted average of the masses of the isotopes of an element (Mass of an element = Protons+Neutrons)

Back

Ductile

Front

A term used to describe a material that can be pulled out into a long wire

Back

Metal

Front

Element on the left side of the Periodic Table that are usually shiny solids that conduct heat or electricity are malleable and ductile.

Back

Law of Conservation of Mass

Front

The law states that mass cannot be created or destroyed in ordinary chemical and physical changes

Back

Electron

Front

Negatively charged particle; located outside the atomic nucleus

Back

Compound

Front

A substance made up of atoms of two or more different elements joined by chemical bonds.

Back

Reactivity

Front

The property that describes how readily a substance combines chemically with other substances

Back

Alkaline Earth Metals

Front

metallic elements in group 2 of the periodic table which are harder than the alkali metals and are also less reactive

Back

Reactant

Front

A chemical substance that is present at the start of a chemical reaction

Back

Subscript

Front

Number placed to the lower right of a chemical symbol to indicate the number of atoms of the element in the molecule present

Back

Brittle

Front

Easily broken; not flexible.

Back

Coefficient

Front

A number in front of a chemical formula in an equation that indicates how many molecules are present

Back

Solid

Front

A state of matter with a definite shape and volume.

Back

Subatomic Particle

Front

An electron, proton, or neutron; one of the three major particles of which atoms are composed

Back

Liquid

Front

A state of matter that has no definite shape but has a definite volume

Back

Nucleus

Front

The center of the atom which contains the protons and neutrons

Back

Alkali Metals

Front

Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium

Back

Valence Electrons

Front

Electrons on the outermost energy level of an atom

Back

Group (Family)

Front

A vertical column of elements in the periodic table; that contain elements with the same number of valence electrons and similar chemical properties

Back

Hydrogen

Front

This element is located in the metal area of the periodic table but it is still a non-metal.

Back

Neutron

Front

A subatomic particle that has no charge and that is found in the nucleus of an atom

Back

Chemical Change

Front

A change that occurs when a substance reacts and forms one or more new substances with different physical properties.

Back

Chemical Formula

Front

Element symbols and subscripts showing the number and types of atoms making up a molecule. ex: NaCl

Back