Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
79 Cards in this Set
- Front
- Back
|
What is a prediction about a problem that can be tested?
|
hypothesis
|
|
|
What is a term for drawing a conclusion based on something you observe?
|
infer
|
|
|
What is the factor being measured in an experiment?
|
variable
|
|
|
What is the first step in the scientific method when designing an experiment?
|
recognize the problem
|
|
|
What is the last step in the scientific method?
|
draw conclusion
|
|
|
What must scientist base their conclusions on to avoid being impartial?
|
evidence
|
|
|
What should be worn at all times to decrease the likelihood of an eye injury?
|
safety goggles
|
|
|
What type of footwear is required in a lab?
|
hard-soled, covered shoes
|
|
|
Which is the correct way to hold a test tube while heating its contents?
|
pointed away from yourself and others
|
|
|
Why should taste never be used to test the identity of an unknown chemical?
|
many chemicals are poisonous
|
|
|
A beaker contains X L of water. What is the volume of water in milliliters?
|
Kilo, Hecto, Deca (LMO) Deci, Centi,Mili
|
|
|
At what temperature does water boil in the metric system?
|
100 degrees Celsius
|
|
|
Convert X grams to kilograms.
|
0.01
|
|
|
Given a diagram, what is the volume of liquid in the graduated cylinder?
|
Measure the volume of liquid from the bottom of the meniscus
|
|
|
How many centimeters are in a meter? Kilometer? Meter?
|
100
|
|
|
How many meters are in a kilometer?
|
1,000
|
|
|
How many millimeters are in a meter?
|
1,000
|
|
|
What are you measuring when you measure something in meters cubed?
|
volume
|
|
|
What is the amount of space taken up by an object?
|
volume
|
|
|
What is the standard unit for length in the metric system?
|
meter
|
|
|
What is the standard unit for mass in the metric system?
|
gram
|
|
|
What is the unit for volume in the metric system?
|
liter
|
|
|
What property of an object is measured in grams?
|
mass
|
|
|
Which unit of length is the best to measure the length of your pencil?
|
centimeter
|
|
|
How are electrons in an atom organized?
|
in energy levels
|
|
|
What are the particles that make up an atom?
|
protons, neutrons, electrons
|
|
|
Where are electrons located in an atom?
|
electron cloud
|
|
|
Which subatomic particles are found in the nucleus of an atom?
|
protons and neutrons
|
|
|
Which subatomic particles in an atom have a negative charge?
|
electrons
|
|
|
Which subatomic particles in an atom have a positive charge?
|
protons
|
|
|
Which subatomic particles in an atom have no charge?
|
neutrons
|
|
|
Which two subatomic particles have the greatest mass?
|
protons and neutrons
|
|
|
Who proposed that all atoms are small, hard particles made of a single material formed into different shapes and sizes?
|
Dalton
|
|
|
Who was the Greek philosopher responsible for naming the atom?
|
Democritus
|
|
|
Given a diagram of an element from the periodic table, find atomic mass.
|
The atomic number is the bottom number
|
|
|
What are atoms of the same element with different numbers of neutrons called?
|
isotopes
|
|
|
An atom’s identity is determined by which subatomic particle?
|
proton
|
|
|
How many elements are in the first period of the periodic table?
|
2
|
|
|
Using a periodic table, be able to determine which element is the most reactive (based on the number of valence electrons).
|
know how
|
|
|
Using a periodic table determine how many electrons an element contains. How many neutrons; how many protons.
|
know how
|
|
|
In what period is calcium (Ca) located?
|
4
|
|
|
Locate elements by period number.
|
be able to locate
|
|
|
On the periodic table, what is a column of elements called?
|
group or family
|
|
|
On the periodic table, what is a row of elements is called?
|
period
|
|
|
What is the name of group 18 on the periodic table?
|
nobel gases
|
|
|
Which of the following elements are halogens:
|
flourine and chlorine
|
|
|
Given a Bohr diagram of an atom determine the atomic number.
|
count the positive charges in the nucleus
|
|
|
How many electrons can the first energy level of an atom hold?
|
2
|
|
|
How many electrons can the second energy level closest to the nucleus hold?
|
8
|
|
|
How many electrons can the second energy level closest to the nucleus hold?
|
2
|
|
|
What is the smallest particle of an element called that has the chemical properties of that element?
|
atom
|
|
|
What is the smallest subatomic particle of an atom?
|
electrons
|
|
|
What items are contained in the nucleus of an atom?
|
protons and neutrons
|
|
|
What must the number of electrons equal in an atom?
|
protons
|
|
|
What type of charge do atoms have?
|
neutral
|
|
|
What type of charge does a neutron have?
|
neutron
|
|
|
What type of charge does a proton have?
|
positive
|
|
|
From the periodic table be able to determine an elements number of valence electrons.
|
be able to determine
|
|
|
What element is a gas at room temperature, and has six electrons in its outer level?
|
Oxygen
|
|
|
Which element has a full outermost energy level containing only two electrons?
|
Helium
|
|
|
Which group have a complete set of valance electrons in their outer energy level?
|
Noble gases
|
|
|
Why do elements in a family or group in the periodic table often share similar properties?
|
Their atoms have the same number of electrons in their outer energy level.
|
|
|
Where are metalloids located on a periodic table?
|
Between metals and nonmtals
|
|
|
Where are the most active metals located on the periodic table?
|
lower left
|
|
|
Which class of elements has no luster, and is a poor conductor?
|
nonmetals
|
|
|
Which element is a metal on the periodic table:
|
Metals are the left of the zig-zag line
|
|
|
Be able to locate the transition elements.
|
middle
|
|
|
Using a periodic table, be able to locate the metals, nonmetals, metalloids, and transition elements.
|
be able to locate
|
|
|
Determine the correct electron-dot diagram for various elements.
|
Li O
|
|
|
What do atoms gain, lose or share when they bond?
|
Electrons
|
|
|
What is the charge of an ion that contains 16 protons and 18 electrons?
|
2-
|
|
|
What is the correct formula for calcium fluoride?
|
CaF2
|
|
|
What is the correct formula for sodium chloride?
|
NaCl
|
|
|
What type of bond holds together a neutral group of atoms?
|
covalent
|
|
|
What type of bond occurs between oppositely charged ions?
|
ionic bond
|
|
|
What type of bond occurs when the force of attraction is between the nuclei of atoms and the electrons shared by the atoms?
|
covalent bond
|
|
|
What is the correct electron-dot diagram of a: chlorine, fluorine, carbon, etc. atom?
|
Cl F C
|
|
|
Which type of element is most likely to gain electrons when it forms bonds?
|
Non-metal
|
|
|
Why don’t noble gases normally form chemical bonds?
|
Have a full outermost energy level
|
