REVIEW

WHAT IS ATOMIC NUMBER, Z?

THE NUMBER OF PROTONS IN THE NUCLEUS OF AN ATOM – ALSO, THE NUMBER OF ELECTRONS IN A NEUTRAL ATOM.

WHAT IS ATOMIC MASS?

ATOMIC MASS = A = # PROTONS + # NEUTRONS

FILL IN THE FOLLOWING TABLE. PARTICLEMASS, AMUCHARGE PROTON NEUTRON ELECTRON

FILL IN THE FOLLOWING TABLE. PARTICLEMASS, AMUCHARGE PROTON1+ NEUTRON10 ELECTRON0-

WHAT IS AN ISOTOPE?

AN ATOM WITH THE SAME ATOMIC NUMBER, BUT DIFFERENT ATOMIC MASS (DIFFERENT NUMBERS OF NEUTRONS).

WHY ARE THE ATOMIC MASSES GIVEN IN THE PERIODIC TABLE SOMETIMES NOT WHOLE NUMBERS?

THEY ARE BASED ON AVERAGES OF THE % WEIGHTED AVERAGES OF THE NATURALLY OCCURING ISOTOPES.

WHAT DETERMINES THE CHEMICAL PROPERTIES OF AN ELEMENT?

THE NUMBER OF PROTONS IN THE NUCLEUS (THE ATOMIC NUMBER), AND, IN TURN, THE NUMBER AND ARRANGEMENT OF THE ELECTRONS IN ORBIT ABOUT THE NUCLEUS.

CONVERT 45 o C TO o F.

o F = 1.8 X o C + 32 o F = 1.8 X = 113 o

CONVERT 400 o K TO o C.

o K = o C o Or o C = o K – 273 o = 400 o o = 127 o

CONVERT 120 LBS TO GRAMS.

1 kg = 2.2 lbs conversion factor 1 = 1 kg/2.2 lbs 120 lbs x 1 kg/2.2 lbs = 54.5 kg 1 kg = 1000 g conversion factor 1 = 1000g/1 kg 54.5 kg x 1000 g/1 kg = g

WHAT ARE THE 3 COMMON STATES OF MATTER?

SOLID, LIQUID, GAS

IN TERMS OF VOLUME AND SHAPE, HOW WOULD YOU CHARACTERIZE EACH OF THEM?

SOLID – DEFINITE VOLUME AND SHAPE LIQUID – DEFINITE VOLUME, BUT ASSUMES THE SHAPE OF THE CONTAINER GAS – NO DEFINITE VOLUME OR SHAPE – ASSUMES THE VOLUME AND SHAPE OF THE CONTAINER

WHAT IS TEMPERATURE A MEASURE OF?

THE AVERAGE KINETIC ENERGY OF THE PARTICLES MAKING UP THE OBJECT

WHY IS A GAS MORE COMPRESSIBLE THAN AN LIQUID?

THE PARTICLES IN A GAS ARE FAR APART AND MOVE INDEPENDENTLY OF EACH OTHER. THE PARTICLES IN A LIQUID ARE CLOSE TOGETHER AND CAN ONLY SLIDE PAST EACH OTHER.

WHAT HAPPENS AT ABSOLUTE ZERO?

THE PARTICLES HAVE ZERO KINETIC ENERGY. THERE IS NO ATOMIC OR MOLECULAR MOTION.

WHAT IS SCIENCE?

THE STUDY OF HOW THINGS HAPPEN.

WHAT IS CHEMISTRY?

THE SCIENCE OF MATTER AND ITS INTERACTIONS.

WHAT IS PHYSICS?

THE SCIENCE OF ENERGY.

A FRIEND OF YOURS WANTS TO TELL YOU A GREAT THEORY HE HAS ABOUT THE EXISTENCE OF GHOSTS. WHAT IS HE REALLY TRYING TO TELL YOU?

THAT HE HAS A HYPOTHESIS (AN IDEA).

HOW DOES A HYPOTHESIS BECOME A THEORY?

THE HYPOTHESIS HAS TO BE TESTED BY EXPERIMENT AND PROVEN TO BE TRUE.

FILL IN THE TABLE BELOW: NAMESYMBOLZ, AT. NO. A, AT. MASS #P#N#E SodiumNa1123 Oxygen88 Carbon126 NeonNe Aluminu m Al1314

FILL IN THE TABLE BELOW: NAMESYMBOLZ, AT. NO. A, AT. MASS #P#N#E SodiumNa OxygenO CarbonC NeonNe Aluminu m Al

WHAT IS THE DIFFERENCE BETWEEN A CHEMICAL PROPERTY AND A PHYSICAL PROPERTY?

A CHEMICAL PROPERTY INVOLVES A CHEMICAL CHANGE (A CHEMICAL REACTION HAS TO OCCUR).

GIVE AN EXAMPLE OF A CHEMICAL PROPERTY.

HOW EASILY A METAL TARNISHES (RUSTS).

GIVE AN EXAMPLE OF A PHYSICAL PROPERTY.

BOILING POINT MELTING POINT HARDNESS COLOR DENSITY

WHAT IS DENSITY?

DENSITY IS A MEASURE OF THE COMPACTNESS OF MATTER. IT IS GIVEN BY DENSITY = MASS / VOLUME

CLASSIFY THE FOLLOWING AS TYPE OF MATTER (ELEMENT, COMPOUND, HOMOGENEOUS MIXTURE, HETEROGENEOUS MIXTURE). ALUMINUM TABLE SUGAR OATMEAL COOKIES PERFUME LIVER

CLASSIFY THE FOLLOWING AS TYPE OF MATTER (ELEMENT, COMPOUND, HOMOGENEOUS MIXTURE, HETEROGENEOUS MIXTURE). ALUMINUM - ELEMENT TABLE SUGAR - COMPOUND OATMEAL COOKIES – HETEROGENEOUS MIXTURE PERFUME – HOMOGENEOUS MIXTURE (SOLUTION) LIVER – HETEROGENEOUS MIXTURE