Coh3 chemical name

WHY IS CHEMISTRY DEFINED PHYSICAL SCIENCE: because they study what exists around the world, like the atoms and molecules and physical science study non-living things.

MASS:measure of amount of matter.MATTER:anything that haves mass and takes up space.ATOM:smallest unit of an element.ELEMENT:substances that cannot be separated/broken down into simpler substances(mades up atoms).COMPOUND:substance made up of atoms can be broken into smaller pieces.LIQUID:state of matter that has a definite volume but not a definite shape.GAS:state of matter that has definite volume or shape.PLASMA:state of matter with high temperature, which atoms lose most of their electrons.CHEMICAL PROPERTY:characteristics/behavior of a substance that can be observed when undergoing a chemical change/reaction.CHEMICAL CHANGE:change that occurs when one or more substances change into new ones.CHEMICAL REACTION:chemical change which form new substances.REACTANT:substance/molecule that participates in chemical reaction.PRODUCT:substance that forms in a chemical reaction.MIXTURE:combination of two or more substances that are not chemically combined.HOMOGENEOUS:solutions that mix together.

SOLUTION:homogeneous mixture of two or more substances.HETEROGENEOUS:like homogeneous but the difference is that they solutions don't mix together.PURE SUBSTANCE:always homogeneous fixed composition, element/compound.

-SCIENTIFIC METHOD:

-observing,-ask a question(why does that occur in my experiment),-form a hypothesis(research to answer the question),-make a prediction based on hypothesis(is my hypothesis is correct)-test the prediction(try my experiment again, contradict/support)-Iterate(reflect result)

-GROUP:vertical column/PERIOD: horizontal column.

-METAL:good electrical/heat conductor/METALLOID:shares both metal and nonmetal characteristics/NONMETAL:poor heat/electric conductor. 

-DIRECTLY PROPORTIONAL:relationship between 2 variables when their ratio is equal to constant value/INVERSELY PROPORTIONAL:relationship between two variable when their product is equal to constant value.

THOMSON:his cathode ray experiment, he provided evidence that atoms have negatively charged molecule that was later called the electron.

RUTHERFORD:discovered the nucleus and concluded that it was really smaller compared with the total volume of an atom.

ATOMIC NUMBER:amount of protons found in the nucleus.ISOTOPE:atoms in a element that have different masses.MASS NUMBER:total number of protons/neutrons in a nucleus.AVERAGE ATOMIC MASS:mass of an atom, expressed in atomic mass number.MOLE:a unit of measurement(the number of atoms of that element equal to the number of atoms)AVOGRADOS NUMBER:number of particles in a mole of pure substance.MOLAR MASS:mass of a mole of a pure substance.LAW OF CONSERVATION OF MASS: this law shows that matter cannot be created or destroyed during a chemical/physical change.LAW OF DEFINITE PROPORTIONS:that a chemical compound contains same elements with equal mass/weight.LAW OF MULTIPLE PROPORTIONS:when 2 elements combine to form 2 or more compounds, the mass of 1 element that combines with the given mass of the other is the ratio of the small whole numbers.

HOW ARE ISOTOPES OF A PARTICULAR ELEMENT ALIKE AND HOW DIFFERENT? Different, because there number of neutrons are different

alike, because they have the same number of protons.

AVERAGE ATOMIC MASS: atomic mass multiplied by its % abundance, the add results and round.

MOLES TO GRAMS: multiply moles by molar mass.

GRAMS TO MOLES: divide grams by molar mass

-Levels hold sublevels which are s-2,p-6,d-10,f-14 electrons