Assessment Review

Quarter 1(rev. 1010)

Is a chocolate chip cookie a homogeneous or heterogeneous mixture?

Ans: heterogeneous mixture

If the density of a ball of metal is 3.52 g/ml and the mass is 15 grams, what is the volume?

Ans: 4.26 ml

Determine the number of significant digits:

0.090

Use the following information to determine the density of a ball.

If you cut a ball in half and find the density, would you still get the same density answer, or a different answer for density?

Ans: Yes, the density would still be the same.

Determine whether the following is a chemical or physical change.

rotting vegetables

Determine whether the following property is a chemical or physical property.

boiling point

If the mass of a block of wood is 28 g and the volume is 35 ml, what is the density?

Ans: 0.8 g/ml

Determine whether the following is a chemical or physical change.

mowing the lawn

How do you tell the difference between a chemical change and a physical change?

Determine whether the following property is a chemical or physical property.

combustibility

Write the definition for the vocab word “element”.

Determine whether the following property is a chemical or physical property.

hardness

Determine whether the following property is a chemical or physical property.

density

Is a glass of chocolate syrup and milk a homogeneous or heterogeneous mixture?ans: homogeneous

How do you determine the following for an “element”?

Mass Number

Determine whether the following is a chemical or physical change.

burning toast

How do you determine the following for an “element”?

Number of Electrons

Review how to determine the following for an “ion.”

Mass Number

List the steps of the Scientific Method

List the scientist’s discovery and experiment (or major accomplishment).

Henri Becquerel

Draw a picture of an atom that has 7 protons, 10 electrons and 7 neutrons.

What is the name of the element the you drew?

Does your drawing represent a neutral atom or an ion?

List the three types of radioactive decay

Review how to determine the following for an “ion.”

Atomic Mass

How could you protect yourself from each type of radiation?

Write the complete symbol for each type of nuclear decay.

List appropriate units for the following:a. mass ________b. volume ________c. density ________

List the scientist’s discovery and experiment (or major accomplishment).

Ernest Rutherford

Review how to determine the following for an “ion.”

Number of Protons

List the scientist’s discovery and experiment (or major accomplishment).

J.J. Thompson

List the scientist’s discovery and experiment (or major accomplishment).

Robert Millikan

List the scientist’s discovery and experiment (or major accomplishment).

John Dalton

Review how to determine the following for an “ion.”

Number of Neutrons

Scientist Answers

Ernest Rutherford Gold Foil Experiment, determined that an atom’s

positive charge (& most of the mass) are concentrated in the nucleus

J.J. Thompson Plum Pudding model of atom, called neg particles

electrons Robert Millikan Oil Drop Experiment, measured the charge of an e-

Scientist Answers

Henri Becquerel Discovered uranium exhibits radioactivity Henry Moseley Determined an atom’s identity comes from

the number of p+ in its nucleus. John Dalton Atomic Theory of Matter

Convert the following:

440 cm to meters ________Ans: 4.4 m

Convert the following:

70099 mm to kilometers _______Ans: 0.070099 km

2.54 cm = 1 in

305 m = ________ inchesAns: 12007.9 in

List the SI units for

length ________ temperature ________ mass ________ Ans: m, K, Kg

Half Life (Remember the licorice lab?)

If you have 40 grams of substance “X” and it has a half-life of 25 years, how much will you have left after 125 years?

Ans: 1.25 grams

Determine the number of significant digits:

0.20001

What is the definition of fission?

Draw a Bohr model picture of O-2

Show the correct number of: Protons Neutrons Electrons

Draw a Bohr model picture of Be+2

Show the correct number of: Protons Neutrons Electrons

What is the definition of fusion?

Determine the number of significant digits:

902.0

Determine the number of significant digits:

602

What is the main difference between one isotope of chlorine and another isotope of chlorine?

Normal Atom, Ion, Isotope

OsMass #: 192# of protons: 76# of neutrons: 116# of electrons: 76Ans: **********

Determine whether the following is a chemical or physical change.

breaking a glass

Normal Atom, Ion, Isotope

OsMass #: 192# of protons: 76# of neutrons: 116# of electrons: 76

Normal Atom, Ion, Isotope

PoMass #: 210# of protons: 84# of neutrons: 126# of electrons: 84

Normal Atom, Ion, Isotope

PoMass #: 210# of protons: 84# of neutrons: 126# of electrons: 84Ans: ***********

Use the following information to determine the density of a ball.

A ball is placed on a balance and the mass is shown to be 3.1 grams.

A graduated cylinder is filled with 10 ml of water. The ball is dropped into the water and the water level rises to 14 ml. Determine the density of the ball.

Ans: 0.775 g/ml

Which of the following is considered a solution: a homogeneous, or a heterogeneous, mixture?

Ans: homogeneous mixture

Do solids, liquids or gases have very loosely packed atoms?

Do solids, liquids or gases have very tightly packed atoms?

2.54 cm = 1 in

67 inches = ________ metersAns: 1.7 m

Describe the difference between the terms accuracy and precision.

Write the definition for the vocab word “mixture”.

How do you determine the following for an “element”?

Number of Neutrons

Write the definition for the vocab word “compound”.

Explain what each of the following pieces of equipment are used for:

– Scoopula– Graduated cylinder– Balance– Beaker– Test tube– Bunsen burner

Review how to determine the following for an “ion.”

Atomic #

Review how to determine the following for an “ion.”

Number of Electrons

How do you determine the following for an “element”?

Atomic #

How do you determine the following for an “element”?

Atomic Mass

How do you determine the following for an “element”?

Number of Protons