WorksheetsCHEM Midterm 23-24
Total questions: 53
Worksheet time: 34mins
Phase changes are chemical changes
True
False
Which of the following is NOT a physical property?
Color
Shape
Flammability
State of Matter
A CHEMICAL change is best described as...
Change in state of matter
Change in appearance
Change in chemical identity
A PHYSICAL change is best described as...
Change in reactivity
Change in appearance
Change in chemical identity
An ion is an atom with a different number of
protons
neutrons
electrons
Air is matter
True
False
The state of matter with the LEAST space between particles is the...
gaseous (gas) state
solid state
liquid state
The state of matter with the MOST space between particles is the..
liquid state
gaseous (gas) state
solid state
The state of matter in which particles have the LOWEST energy is the...
solid state
liquid state
gaseous (gas) state
The state of matter in which particles have the GREATEST energy is the...
liquid state
solid state
gaseous (gas) state
As you heat a substance...
Particles speed up
Particles slow down
Particles go a constant speed
Particles stop moving
During a phase change, temperature is constant
True
False
Substances that are MORE dense than what they are placed into will...
Sink
Float
True or False: Cold Air is LESS dense than hot air
True
False
Density measures:
How heavy an object is
How much space an object takes up
The compactness of an object's weight in a certain volume/space
The flow resistance of a fluid
Atomic number tells us the number of
protons
neutrons
protons & neutrons
Mass number tells us the number of
protons
neutrons
protons & neutrons
Regarding the nucleus of the atom, which of the following is TRUE?
It contains protons and neutrons, and has a positive charge
It contains protons and electrons, and has a positive charge
It contains protons and neutrons, and has a neutral charge
It contains protons and electrons, and has a neutral charge
A CATION is formed by:
LOSING electrons
GAINING electrons
GAINING protons
LOSING protons
An ANION is formed by:
LOSING electrons
GAINING electrons
GAINING protons
LOSING protons
How many N atoms in: Al(NO3)3
How many H atoms in: HC2H3O2
How many H atoms in: 2 Al(OH)3
An ELEMENT is made up of
One kind of atom
Two or more kinds of atoms
One type of compound
An COMPOUND is made up of
One kind of atom
Two or more DIFFERENT kinds of atoms
Two of the SAME type of atom
Which of the following is TRUE about COMPOUNDS?
They can only be separated CHEMICALLY
They can only be separated PHYSICALLY
They cannot be separated
True or False: All electromagnetic radiation travels at the speed of light
True
False
When electrons travel from a ________ energy level to a _______ energy level, they release energy
higher, lower
lower, higher
Which region of the electromagnetic spectrum has the LONGEST wavelength?
radio waves
microwaves
visible light
gamma rays
As a wave GAINS energy, the frequency...
increases
decreases
stays the same
As wavelength INCREASES, frequency...
Increases
Decreases
Stays the same
The rule that states lower energy orbitals get filled before higher energy ones
Pauli Exclusion Principle
Aufbau Principle
Hund's Rule
Photoelectric Effect
The rule that states all orbitals of a specific energy level must receive 1 electron before any get 2
Pauli Exclusion Principle
Aufbau Principle
Hund's Rule
Photoelectric Effect
The rule that states no two electrons can have the same spin
Pauli Exclusion Principle
Aufbau Principle
Hund's Rule
Photoelectric Effect
The lowest potential energy orbital is the:
Ground state
Excited state
Zero state
Frozen state
The greatest potential energy orbital(s) are the:
Ground states
Excited states
Zero states
Frequency states
The alkali metals have
1 valence electron
2 valence electrons
7 valence electrons
8 valence electrons
The halogens have
1 valence electron
2 valence electrons
7 valence electrons
8 valence electrons
Another name for "row" on the periodic table is
period
group
family
Another name for "column" on the periodic table is
period
group
Groups/families are organized in order of
atomic number
chemical properties
Rows are organized in order of
atomic number
chemical properties
Coulomb's Law states that opposite charges
attract
repel
Coulomb's Law states that like charges
attract
repel
Going DOWN a column, atomic radius
Increases
Decreases
Stays the same
Going ACROSS a row, atomic radius
Increases
Decreases
Stays the same
Which element is the most electronegative?
Fluorine
Chlorine
Hydrogen
Carbon
Halogens have a LARGE electronegativity because
they want to GAIN an electron
they want to LOSE an electron
Atomic radius increases going DOWN a column because
more electron layers
more protons in the nucleus
When going DOWN a column on the periodic table, reactivity generally:
Increases
Decreases
Stays the same
In order for an atom to become stable, it requires:
A full outer shell of valence electrons
0 valence electrons
1 valence electron
4 valence electrons
