WorksheetsAtomic Structure
Total questions: 41
Worksheet time: 23mins
Atoms of elements in the same group of the periodic table share the same
number of energy levels
atomic masses
number of valence electrons
atomic numbers
What is an atom’s nucleus made of?
protons only
protons and electrons
protons and neutrons
neutrons only
How many electrons will a neutral atom of carbon have if its nucleus has 6 protons and 8 neutrons?
6
8
12
14
An element with 7 protons, 9 neutrons, and 7 electrons has an atomic number of
7
9
16
23
An element with 5 protons, 6 neutrons, and 8 electrons has a mass number of
5
6
8
11
The farther an electron is from the nucleus, the more _______ it has.
size
mass
energy
charge
Atoms of the same element that have different numbers of neutrons are called
protons
isotopes
ions
molecules
The total number of electrons in the outer shell of a sodium atom is
1
2
3
11
Which particles determine the atomic number of an element?
Protons only
Neutrons only
Neutrons and protons
Protons and electrons
The total number of neutrons in the nucleus of any atom is equal to the
mass number of the atom
mass number minus the atomic number
atomic number of the atom
atomic number minus the mass number
Two different isotopes of an element have different
numbers of neutrons
numbers of protons
atomic numbers
nothing is different about them
Two different isotopes of an element have the same
nothing is the same about them
numbers of neutrons
mass numbers
numbers of protons
The maximum number of electrons that can occupy the 2nd shell of an atom of magnesium is
1
2
8
18
The mass of the most common isotope of an element is known based on an element’s
Mass number
Number of electrons
Atomic number
Average atomic mass
What is the correct electron arrangement for sulfur? (Hint: think about electron shells/energy levels!)
2-8-6
2-8-4
4-6-2
2-8-8
Which of the following is a transition metal?
Tellurium
Aluminum
Nickel
Calcium
An atom is neutral because
neutrons balance the protons and electrons
nuclear forces stabilize the charges
the numbers of protons and neutrons are equal
the numbers of protons and electrons are equal
An unstable nucleus results from too many or too few
protons
neutrons
radons
electrons
Which part of the periodic table indicates the number of energy levels in the electron cloud?
Valence electrons
Group
Family
Period
What is the correct symbol for an isotope of carbon with 6 protons and 6 neutrons?
Which statement about the arrangement of the periodic table is not true?
Rare earth elements are in the first column on the left
Transition metals are in the center of the periodic table
Metals are found on the left side of the periodic table
Noble gases are in the group farthest to the right
Boron, carbon, nitrogen and oxygen are all members of the same
Group
Valence level
Family
Period
Which nonmetal is the most reactive?
Fluorine
Chlorine
Bromine
Iodine
Which of the following elements would be the best conductor of electricity?
Iodine
Argon
Silver
Silicon
Which of the following elements would be the least reactive?
Lithium
Sodium
Potassium
Rubidium
At room temperature, most metals are
Solids
Liquids
Gases
Plasma
Hydrogen is in group 1 with lithium, sodium, potassium, rubidium, cesium, and francium because it
Has 1 energy level
Has 1 valence electron
Is a gas
Is a metal
Ernest Rutherford is known for
Electron Cloud Model; surrounding the nucleus is an electron cloud made of shells – electrons do not, however, travel in a fixed orbit
Arranged the elements on the periodic table based on atomic number
Gold Foil experiment allowed him to discover that the nucleus was the positively charged center of the atom surround by negatively charged electrons
Arranged the elements on the periodic table based on atomic mass
Niels Bohr is known for
Named the atom based on the Greek word meaning indivisible
Electrons travel in fixed orbits around the nucleus of the atom
Solid Sphere Model; elements are atoms with different masses
Plum Pudding Model; atom is positive sphere with negatively charged particles evenly embedded throughout
Democritus is known for
Named the atom based on the Greek word meaning indivisible
Arranged the elements on the periodic table based on atomic mass
Arranged the elements on the periodic table based on atomic number
Electrons travel in fixed orbits around the nucleus of the atom
Dmitri Mendeleev is known for
Gold Foil experiment allowed him to discover that the nucleus was the positively charged center of the atom
Arranged the elements on the periodic table based on atomic number
Solid Sphere Model; elements are atoms with different masses
Arranged the elements on the periodic table based on atomic mass
Dalton is known for
Electron Cloud Model; surrounding the nucleus is an electron cloud made of shells
Solid Sphere Model; elements are atoms with different masses
Plum Pudding Model; atom is positive sphere with negatively charged particles evenly embedded throughout
Nuclear Model; Gold Foil experiment allowed him to discover that the nucleus was the positively charged center
Schrodinger and Heisenberg are known for
Named the atom based on the Greek word meaning indivisible
Arranged the elements on the periodic table based on atomic number
Electron Cloud Model; surrounding the nucleus is an electron cloud made of shells
Plum Pudding Model; atom is positive sphere with negatively charged particles evenly embedded throughout
Henry Moseley is known for
Solid Sphere Model; elements are atoms with different masses
Arranged the elements on the periodic table based on atomic number
Electrons travel in fixed orbits around the nucleus of the atom
Arranged the elements on the periodic table based on atomic mass
JJ Thomson is known for
Plum Pudding Model; atom is positive sphere with negatively charged particles evenly embedded throughout
Electron Cloud Model; surrounding the nucleus is an electron cloud made of shells – electrons do not, however, travel in a fixed orbit
Solid Sphere Model; elements are atoms with different masses
Nuclear Model; Gold Foil experiment allowed him to discover that the nucleus was the positively charged
Proton
A subatomic particle with a negative charge
The positively charged center of that atom where most of the mass of the atom is located
The subatomic particle with no charge (therefore electrically neutral)
A subatomic particle with a positive charge
Neutron
A subatomic particle with a positive charge
The subatomic particle with no charge (therefore electrically neutral)
A subatomic particle with a negative charge
The negatively charged area around the nucleus where the volume of the atom is located
Electron
The subatomic particle with no charge (therefore electrically neutral)
The smallest known particles that make up protons and neutrons
A subatomic particle with a negative charge
he negatively charged area around the nucleus where the volume of the atom is located
Quarks
The positively charged center of that atom where most of the mass of the atom is located
The smallest known particles that make up protons and neutrons
The subatomic particle with no charge (therefore electrically neutral)
A subatomic particle with a positive charge
Nucleus
A subatomic particle with a negative charge
The positively charged center of that atom where most of the mass of the atom is located
The negatively charged area around the nucleus where the volume of the atom is located
The subatomic particle with no charge (therefore electrically neutral)
Electron cloud
A subatomic particle with a negative charge
The positively charged center of that atom where most of the mass of the atom is located
The smallest known particles that make up protons and neutrons
The negatively charged area around the nucleus where the volume of the atom is located
