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WorksheetsScience Midterm
Total questions: 81
Worksheet time: 41mins
The first periodic table, created by Russian chemist and teacher Dimitri Mendeleev, was organized by the
physical property
atomic mass
color
number of electrons
melting point
Alkali metals are in the first column of the periodic table, we call these columns
nonmetals
groups
periods
metals
Patterns in properties are easily observed in the rows of the table, we call these
groups
metals
periods
metalloids
In the early 20th century, scientist Henry Mosely solved the problem with Mendeleev’s table by ordering
things based on
nuetrons
metals
chemical symbols
atomic number
An elements shows the name, symbol, state of matter, number and
reaction level
image
neutron number
mass number
Which group represents the majority of the table?
nonmetals
metalloids
metals
liquids
Which group represents gases at room temperature?
oxygen group
nonmetals
metals
metalloids
The group that contains semiconductors
metalloids
silicons
metals
nonmetals
All of the elements in groups 1-12 are metals except
hydrogen
helium
oxygen
gold
What describe a metal’s ability to reflect light?
shean
luster
maleability
ductility
A piece of gold with the mass of a paper clip can be pulled into a wire that is more than 3 Km long, this is the
property of
luster
malleability
ductility
conductivity
The metals in group 2 are called
halogens
transition metals
alkali metals
alkaline earth metals
The metals in groups in 3-12 are named the
metalloids
alkali metals
middle metals
transition metals
Metals that are very reactive and have low densities are found in the group named
transition metals
metalloids
alkali metals
alkaline earth metals
96% of the mass of your body comes from just four elements in which group
metals
nonmetals
metalloids
transition metals
Phosphorus and carbon are dull, brittle solids that do not
conduct thermal energy or electricity
form compounds
melt
differ from metals
This group can react with metals and form salts, they all end with -ine
metalloids
halogens
noble gasses
nonmetals
This group will only react with other elements under special conditions in the lab
nonmetals
halogens
noble gases
alkali metals
The deck of cards were used to layout a model of the periodic table. In every example you had a “gap” in
your table. What two things would you use to determine the identity of the missing card in any given gap?
Matter that has a definite shape and definite volume would most likely be
solid
liquid
gas
plasma
A diamond and a chunk of coal are both made up of carbon atoms, the difference is in how those carbon atoms are arranged. A diamond has what kind of structure?
expensive
amorphous
crystaline
hard
Matter that has a definite volume but no definite shape would be
solid
liquid
gas
plasma
What effect does raising the temperature of honey have on its viscosity?
reduces
no effect
increases it
eliminates it
We were able to drop many more drops on the surface of a penny in our lab than most of us thought because the strength of water’s
density
mass
volume
surface tension
Matter that has no definite shape or definite volume is
a solid
liquid
gas
plasma
The gas state of water or gasoline is called a
vapor
gas
mixture
solution
All particles that make up matter have motion and therefore they generate
kinetic energy
atoms
fusion
compounds
How does a solid become a gas without being a liquid
deposition
sublimation
evaporation
condensation
How does a gas become a solid without becoming a liquid?
deposition
sublimation
evaporation
condensation
What process is the opposite of evaporation?
deposition
sublimation
condensation
expansion
The amount of force applied per unit of area is called.
conservation of energy
volume
molecular theory
pressure
What unit of measurement do we use for pressure?
P
kPa
pa
Kpa
Which Greek philosopher was noted for challenging the popular idea for matter?
Aristotle
Biden
Plato
Democritus
Which scientist revisted the idea of empty space making up much of matter and rejected the idea of earth, water, air, and fire?
Rutherford
Dalton
Bohr
Thomson
Atoms are very small, so small that you easily fit up to---- carbon atoms in the period of a sentence
7.5 million
7.5 billion
7.5 trillion
7.5 thousand
Which of these scientists first proposed that atoms contain electrons that have a negative charge?
Thomson
Dalton
Rutherford
Bohr
Which one of these scientists discovered the nucleus of the atom?
Rutherford
Thomson
Bohr
Dalton
Which one of scientists proposed that electrons move in a circular orbit around the nucleus?
Bohr
Rutherford
Chadwick
Dalton
Which atomic model added the idea of the electron cloud?
Rutherford Model
Modern Model
Dalton Model
Bohr Model
Just as atoms are made of smaller parts, protons, and neutrons are also made up of
beta
alpha
elements
quarks
If you know the number of protons you will also be able to determine the number of
Electrons
neutrons
atoms
isotopes
The number of protons in an atom determine the element's
atomic number
neutrons
atomic mass
number of isotopes
Atoms of the same element that have different number of neutrons are called
Quarks
Neutrides
Elements
Isotopes
Carbon has 6 protons and the isotope C-13 must have how many neutrons
6
7
8
9
Why is the mass number of most elements always written as a decimal number?
It is difficult to measure
It is an average
They are really small
It is a sum
Becquerel, Pierre, and Marie Curie are noted for the accidental discovery of
Atoms
Periodic Table
Radioactivity
Isotopes
What type of ray does not contain particles, but they do contain a lot of energy?
Beta
Alpha
Gamma
x
Made of two protons and two neutrons
Alpha Particle
Beta Particle
Made up of a high energy electron
Alpha Particle
Beta Particle
If Uranium-238 experiences alpha decay, it will become Thorium-(insert number here as answer)
(a)
If an imaginary element has a half-life of 10 seconds, and you start with 100 grams, how many grams will you have after 30 seconds of decay?
(a)
What is a good synonym (similar word) for prodigious?
(a)
What would be a good example of a physical change
ice melting into a pool of water
silver tarnishing
roasting marshmallows
rust forming on a nail
When you have a physical change you will never end up with
a change in state
a change in size
a new substance
a change in shape
Adding thermal energy to matter may cause
particles to freeze
particles to remain the same
a new substance to form
the state to change
The boiling point of matter is the point at which
a solid becomes a liquid
a liquid becomes a solid
a liquid becomes a gas
a solid becomes a gas
What do we call it when a gas becomes a liquid?
condensation
sublimation
vaporization
boiling
Freezing and Melting are reverse processes, but they
occur at different temps
occur at the same temp
never require a change in energy
never happen to matter
If a sample of water has a mass of 75g and you add 25g of a solute, you will have a final solution with a total mass of 100g. This is because of
the law of dissolving
the law of solubility
the law of conservation of mass
the law of states of matter
What is another way to represent volume besides using the mL measurement?
g/ml
g
gallons
cm3
What is a good example of a chemical property?
ability to burn
ability to change states
ability to change size
ability to freeze
Which one of these is proof of a chemical change.
bubbles
the formation of a new substance
the formation of the same substance
added energy
. Watermelon sales increase during the months of May, June, and July. Drownings also increase during the same three months, consistently. You could say
they have a causal relationship
e watermelon sales are making people drown th
they are negatively correlated
they are positively correlated
What do we call the substances on the left side of a chemical equation, before the reaction occurs?
products
reactants
chemical symbols
the yield
What do we call the new substances formed after a chemical reaction?
the yield
products
reactants
chemical symbols
The arrow in a chemical formula is read as
reactant
symbol
product
yield
Anything that has mass and takes up space can be considered as
matter
density
substances
mixtures
. Also known as the building blocks of matter, these tiny particles are 1,000,000 times smaller than
atoms
electrons
neutrons
protons
Nitrogen, Oxygen, Gold are all examples of
elements
solutions
mixtures
compounds
If you were to investigate the nucleus of an atom, you would likely find
a cloud of electrons
neutrons and protons
neutrons and electrons
neutrons only
What would you call H2O and H2O2?
elements
compounds
mixtures
solutions
Crunchy peanut butter is a great example of a
homogeneous mixture
solution
compound
heterogeneous mixture
When you mix table salt with water the salt is the
compound
solution
solvent
solute
Higher temperatures and surface area usually increase the rate of a reaction, but you can increase the rate of a reaction by increasing the
(a)
In our lab we made sure to fill the graduated cylinder to the 170mL mark. The water level in that cylinder is determined by the (a) line.
In our lab on density we were able to determine the volume of an irregular shape (the bolt) by measuring the (a) of water.
Both of the following classifies physical properties: they can be either size ______________or size ___________________.
(a)
What is the formula for density?_
(a)
If a substance had a mass of 33g, and a volume of 11mL, what would the density of that substance be?
(a)
If you were trying to sell an electronic vehicle to a potential buyer who was concerned about carbon emissions, what would you omit from your sales pitch?
(a)
explain why melting points are considered independent properties of matter.
(a)
