Physical science Final
82
A common isotope of Iron has an atomic number of 26 and a mass number of 56. The total number of subatomic particles in the nucleus is
7
A common isotope of carbon has an atomic number of 6 and a mass number of 13. How many Neutrons are in an atom of this isotope
In the same direction as the oscillations
A longitudinal wave travels
Neutron
A nuclear particle that has about the same mass as a proton, but with no electric charge, is called a(n)
Blue light
A photon of which the following has the most energy
Like signs
A repelling force occurs between two charge objects when the charges are of
Cycle
A unit of motion repeated over and over again is called the:
Second
A unit used to measure the period of a cycle is the
Age, loud sounds, and Hugh frequency sounds
Ability to hear my be affected by:
Empty space
According to the Rutherford model, what makes up the most of the VOLUME of an atom
27
An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. It's mass number is
Electrons
An atom ____ in various energy levels
Move from a low energy level to a high energy level
An atom absorbs energy as its electrons
Moves from a high energy level to a low energy level
An atom emits light when one of its electrons
7
An atom of nitrogen has how many electrons
28
An iron ion has atomic number of 26 and a mass number of 56, and a net charge of -2. The total number of electrons is?
Refraction
As a wave front crosses a boundary between two different media, the wave front may change direction, an interaction known as:
3
At atom contains 11 electrons. If a 12th electrons were added to the atom, the energy level into which it would be placed is energy level:
The number of protons in an ato,
Atomic number is
Isotopes
Atoms with the same atomic number but different atomic mass are called:
Electron
British physicist J.J. Thomson was the first to identify the:
Proton
British physicist J.J. Thomson was the first to identify the:
Conductors
Charge is most easily transferred in
Much smaller mass and opposite charge
Compared to protons, electrons have
Multiple waves combine to make a wave of smaller amplitude
Destructive interference occurs because
Has undergone many reversals in polarity
Earths magnetic field
Coulombs
Electric charge
Amps
Electric current
Volts
Electric potential difference
Farther with higher energy are located
Electrons with higher energy level area located:
Electron
Experiments with cathode rays led to the discovery of the
Energy must be absorbed
For an electrons in an atom to change from the ground state to an excited state,
Both attract the opposite type and repel the same type
How are electric charge and magnetic poles similar
4
How many energy levels are filled in a krypton atom?
7
How many orbitals are in the "f" sub group
Both pieces have a north and a South Pole on each end
If a 12-inch long bar magnet is cut into two pieces, one inch from the North Pole of the magnet:
Electrostatic repulsion between the positively charged nucleus and alpha particles
In Rutherfords experiment, why did the nucleus repel alpha particles
Passed through the foil
In the gold foil experiment, most of the particles fired at the foil
Masses
Isotopes are atoms of the same element that have different
Nucleus
Most of the mass of an atom is occupied by
Electron cloud
Most of the volume of an atom is occupied by the
All lithium atoms contain the same number of protons
Of the following statements, the one which is ALWAYS TRUE is:
An attractive force between the magnets
Placing the North Pole of a magnet near the South Pole of another magnet results in:
Watts
Power
Nucleus
Protons and neutrons are found grouped together in the:
Ohms
Resistance
Have a reversed north and South Pole direction
Reverse the direction of current in a wire, and the magnetic field around the wire will
Nucleus
Rutherfords experiment involving the use of alpha particle beams directed onto thin metal foils demonstrated the existence of which of the following
Longitudinal waves
Sound waves
Faster in steel than in air
Sound will travel
Atoms and molecules
The "building blocks" of matter are:
Period
The amount of time required for one cycle to occur is called the:
Electron
The first part of an atom to be discovered was the
Electron
The gold foil experiment led to the discovery of the
About the same as that of a proton
The mass of a neutron is
Frequency
The measure of the number of cycles per second is called
They have completely filled outer electron shells
The noble gases, such as helium and xenon, are non-reactive because:
Tightly packed origins and neutrons
The nucleus of most atoms is composed of
5
The number of orbitals for the d sublevel is
Longitudinal
The oscillation of air pressure can result in ___waves
340
The speed of sound in air at normal temperature is about ____m/s
Electromagnet
The type of magnet made using wires and electric current is a(n)
Hertz
The unit for measuring the frequency of an oscillating system is the:
Absorb
Theaters often use heavy curtains to reduce echoes during performances. The function of the curtains is to ____ sound
Increase the number of coils, increase the current, and add iron to the core
Three ways you can increase the strength of an electromagnet are:
Constructive interference
Two large waves on the ocean come together on the oceans surface to form a gigantic wave. The interaction responsible for this is called:
An atom contains a small, dense, positive charges central region
What did Rutherford conclude about the structure of the atom
An atom contains a small, dense, positively charged central station
What did Rutherford conclude about the structure of the atom
Nucleus
What do we call the tiny core at the center of an atom, containing most of the atoms mass and all of its positive charge
Electrons are added to the rod
What happened when a rubber rod is rubbed with a piece of fur, giving it a negative charge?
The magnetic field will be stronger
What happens if you increase the current in an electromagnet
The north and south poles are reversed
What happens if you reverse the direction of the current flow in an electromagnet
Nucleus
What is the concentration of positive charge and mass in Rutherfords atomic model
2.5MeV
What is the energy of a photon whose frequency is 6.0x10^20 Hz
7
What is the maximum ground state for an electron
40m/s
What is the speed of a 50 g rock is its de Broglie wavelength is 3.32x10^-34m?
The mass of the gold atom is concentrated in a tiny, dense core
When Ernest Rutherford directed helium ions at gold foils, some of the helium ions bounced back in the direction they came from, rather than passing through. What was his explanation of this unexpected result?
[Ar]4s^23d^4
Which is the electron configuration for 24Cr
The number of protons in an atom is its atomic number
Which of the following is NOT part of Daltons atomic theory
The number of protons in an atom is its atomic number
Which of the following is NOT part of Daltons atomic theory?
All atoms of the same element have the same number of electrons and protons, but may have different numbers of neutrons
Which of the following is a TRUE statement about atoms
Electrons emit radiation continuously while orbiting the nucleus
Which of the following is not a feature of Bohrs model of the atom
Wood
Which of the following materials is LEAST affected by magnetism
The number of protons might be different between the two isotopes
Which of the following statements about isotopes of the same element is FALSE
Ernest Rutherford
Who explained the behavior of positively charged particles being deflected from a metal foil as the nucleus
John Daltom
Who first proposed an atomic theory based on scientific knowledge, stating that all matter is made up small particles called atoms?
J.J. Thompson
Who proposed the plum pudding model
J.J. Thompson
Who proposed the plum pudding model?
Joules
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