| A | B |
|---|
| Matter | the substance of which an object is made |
| Amount of Matter | determines the mass of that object |
| What is matter | anything that take up space |
| Matter's two types | Physical properties and Chemical properties |
| Physical Property | charact. that can be observed without changing the composition of the substance |
| Chemical Property | charact. that describe how a substance interacts with other substances to produce different kinds of matter. |
| What makes up Matter | elements |
| Element | a substance that has a charact. set of physical and chemical properties. |
| How many occur naturally in the earth | over 90 elements. |
| how elements are divided | 98% earth crust, 75% silicon and oxygen make up the Earth's crust. |
| Atoms | Is an element and is the smallest unite of an element and has ll the properties of that element. |
| What are Atoms made of | made up of 7 smaller parts called substomic particles |
| Three major kinds of subatoms particles | electrons, protons and neutrons |
| Neutron | carry negative electrical charge |
| Protons | carry a positive charge |
| Neutrons | neutral having No net electrical charge. |
| Protons and Neutrons together form | nucleus |
| Nucleus | a small region in the center of an atom. |
| electron cloud | region of space around the nucleas of an atom in which electrons may be found |
| atomic number | is equal to the number of protons in the nucleus |
| Mass number | sum of the numbers of protons and neutron in an atom |
| isotpoes | atom of an elementthat has the same atomic number but different atomic mass than another atom of that element |
| classify matter into three physical forms | solid, liquid and gas |
| compound | a substance that results when the atoms of two or more elements are chenmically combined |
| molecule | smallest complete unit of a compound |
| diatomic | consisting of two atoms |
| energy levels | arranceent of electrons within the electron cloud of an atom |
| chemical bonds | forces that hold together the atom that make up a compound |
| ionic bond | bond in which electrons are transferred from one atom to another |
| ionic compound | compound formed through the transfer of electrons |
| ion | atom or group of atoms that carries an electrical charge |
| Color and hardness are examples of an elements | physical properties |
| A substance that cannot be broken down into a simpler form by ordinary chemical means is | a gas |
| The smalles unit of an element is | an atom |
| Particles in atoms that do not carry an electricle charge are called | neutrons |
| The number of protons in the nucleus indicates the atoms is | atomic number |
| The mass numbe3r of an atom is equal to its | total number of neutrons and protons |
| Atoms of the same element that differ in mass are | isotopes |
| A material with a definite shape and volume is a | solid |
| A liquid does not have a definite | shape |
| If a gas is not confined, the space between its particles will | decrease rapidly |
| Atoms of two or more elements that are chemically united form | a compound |
| An atom does not easily lose or gain electrons if it has | a filled outer energy level |
| A molecule of water, or H2O has pre atom of | oxygen |
| A aterial that contains two or more sustances that are not chemically confined is | a mixture |
