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WorksheetsThe Atom Playlist - FInal Review
Total questions: 61
Worksheet time: 45mins
An atom is
the smallest unit of matter that maintains its chemical identity.
the smallest unit of a compound.
always made of carbon.
smaller than an electron.
A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n)
nuclide.
neutron.
electron.
isotope.
An atom is electrically neutral because
neutrons balance the protons and electrons.
nuclear forces stabilize the charges.
the numbers of protons and electrons are equal.
the numbers of protons and neutrons are equal.
Isotopes are atoms of the same element that have different
principal chemical properties.
masses.
numbers of protons.
numbers of electrons.
All isotopes of hydrogen contain
one neutron.
two electrons.
one proton.
two nuclei.
The atomic number of oxygen, 8, indicates that there are eight
protons in the nucleus of an oxygen atom.
oxygen nuclides.
neutrons outside the oxygen atom's nucleus.
energy levels in the oxygen atom's nucleus.
As the atomic number increases, the number of electrons in a neutral atom
decreases.
increases.
remains the same.
is undetermined.
All atoms of the same element have the same
atomic mass.
number of neutrons.
mass number.
atomic number.
The average atomic mass of an element is the calculated average of the atomic masses of its
naturally occurring isotopes.
two most abundant isotopes.
radioactive isotopes.
artificial isotopes.
The atomic mass of an element listed in the periodic table is the
average atomic mass.
relative atomic mass of the most abundant isotope.
relative atomic mass of the most abundant radioactive isotope.
mass number of the least abundant isotope.
An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is
13.
14.
27.
40.
Chlorine has atomic number 17 and mass number 35. It has
17 protons, 17 electrons, and 18 neutrons.
35 protons, 35 electrons, and 17 neutrons.
17 protons, 17 electrons, and 52 neutrons.
18 protons, 18 electrons, and 17 neutrons.
What is the relative charge of an electron?
+1
-1
0
-2
The number of atoms in 1 mol of carbon is
6.022 x 1022.
6.022 x 1023.
5.022 x 1022.
6.22 x 1023.
Avogadro's number is
the maximum number of electrons that all the energy levels can accommodate.
the number of protons and neutrons that can fit in the shells of the nucleus.
the number of particles in 1 mole
the number of particles in exactly 1 gram
Scientific notation is a way to
express very large or very small numbers and still be able to do math with them.
express a scientific theory
notate the number of experiments done
an exercises is annoying me and making me do yet more math
What element has the atomic number 10
Helium
Neon
Argon
Krypton
What element has the atomic number of 12
Lithium
Oxygen
Manganese
Magnesium
Carbon has an average atomic mass of
14.00674
12.011
10.811
210
Hydrogen has an average atomic mass of
1.00794
9.012182
28.0855
190.23
The chemical with the symbol of H is
Hydrogen
Helium
Heleous
Hammered
The element with the chemical symbol of B is
Boron
Bromine
Beryllium
Bakerstreet
What is the relative charge of an proton?
+1
-1
0
-2
What is the relative charge of an neutron?
+1
-1
0
-2
When matter is a gas what does its atoms look like?
When matter is a liquid what does its atoms look like?
When matter is a solid what does its atoms look like?
Which state of matter has both a definite volume and definite shape?
Solid
Liquid
Gas
Plasma
Which state of matter has a definite volume and no definite shape?
Solid
Liquid
Gas
Plasma
Which state of matter has no definite volume and no definite shape?
Solid
Liquid
Gas
Plasma
How would you express 10,000 in scientific notation?
1 x 105
1 x 104
1 x 103
1.0000
How would you express 555,000,000,000 in scientific notation?
5.55 x 1011
555 x 109
5.55 x 10-11
5.55 x 109
How would you express .00000000001 in scientific notation?
1 x 1011
1 x 10-11
.00000000001
1 x 1010
How would you express .00568 in scientific notation?
5.68
5.68 x 103
5.68 x 10-3
568.00
What two particles are in the nucleus of an atom?
protons and electrons
electrons and neutrons
protons and neutrons
What subatomic particle(s) would be found orbiting the nucleus?
Neutrons only
Electrons only
Protons and Neutrons
Protons and Electrons
Which subatomic particles contribute the most to the mass of an atom?
Protons, Neutrons, Electrons
Protons only
Protons and Electrons
Protons and Neutrons
Proton
Positively charged particle in the nuclei of an atom that contributes to the mass to the atom
Neutral particle in the nuclei of an atom that contributes to the mass to the atom
Negatively charged particle that revolves around the nucleus does not contribute mass to the atom.
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
Neutron
Positively charged particle in the nuclei of an atom that contributes to the mass to the atom
Neutral particle in the nuclei of an atom that contributes to the mass to the atom
Negatively charged particle that revolves around the nucleus does not contribute mass to the atom.
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
Electron
Positively charged particle in the nuclei of an atom that contributes to the mass to the atom
Neutral particle in the nuclei of an atom that contributes to the mass to the atom
Negatively charged particle that revolves around the nucleus does not contribute mass to the atom.
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
State of matter
one of the distinct forms in which matter can exist (Solid, Liquid, Gas, Plasma)
the sum of the masses of its isotopes, each multiplied by its natural abundance.
found on the periodic table at the top of chemical symbols, it represents the number of protons in the nucleus of an atom of that element.
Total number of protons and neutrons in the nucleus of an atom of an element.
Average atomic mass
one of the distinct forms in which matter can exist (Solid, Liquid, Gas, Plasma)
the sum of the masses of its isotopes, each multiplied by its natural abundance.
found on the periodic table at the top of chemical symbols, it represents the number of protons in the nucleus of an atom of that element.
Total number of protons and neutrons in the nucleus of an atom of an element.
Atomic number
one of the distinct forms in which matter can exist (Solid, Liquid, Gas, Plasma)
the sum of the masses of its isotopes, each multiplied by its natural abundance.
it represents the number of protons in the nucleus of an atom of that element.
Total number of protons and neutrons in the nucleus of an atom of an element.
Mass Number
one of the distinct forms in which matter can exist (Solid, Liquid, Gas, Plasma)
the sum of the masses of its isotopes, each multiplied by its natural abundance.
found on the periodic table at the top of chemical symbols, it represents the number of protons in the nucleus of an atom of that element.
Total number of protons and neutrons in the nucleus of an atom of an element.
Isotope
atom of an element that has the same number of protons but a different number of neutrons there for a different mass number.
a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12.
the SI unit of amount of substance, equal to 6.022 X 1023 atoms
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
Atomic Mass Units (AMU)
atom of an element that has the same number of protons but a different number of neutrons there for a different mass number.
a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12.
the SI unit of amount of substance, equal to 6.022 X 1023 atoms
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
Mole
atom of an element that has the same number of protons but a different number of neutrons there for a different mass number.
a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12.
the SI unit of amount of substance, equal to 6.022 X 1023 atoms
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
What is the mass of one mole of Chlorine atoms (Cl) in grams?
35.47
35
187
35.453
Molar mass
is the mass in grams of one mole of a substance.
is numerically equal to the average atomic mass of the element.
Both (a) and (b)
Neither (a) nor (b)
What is the mass of one mole of Sodium atoms (Na) in grams?
22.989707
11
187.56981
22
Freezing is a heat ____________ process.
loss
gain
Melting is a heat __________ process.
gain
loss
Condensation occurs when warmer water vapour comes into contact with a cooler surface. In this processes heat is ________?
lost
gained
Boiling is a heat __________ process.
loss
gain
An element has an atomic number of 7 and a mass number of 16. How would you write the name of this isotope?
Sulfur-7
Nitrogen-7
Sulfur-16
Nitrogen-16
An element has an atomic number of 53 and 52 neutrons. How would you write the name of this isotope?
Tellurium-105
Iodine-105
Tellurium-53
Iodine 105
What are two ways the actual mass of an element can be expressed? Select all that apply.
grams by Moles
atomic number
atomic mass units
Average Subatomic Particle Mass
A nuclear particle that has a mass of 1 AMU, and a charge of 1+, is called a(n)
proton.
neutron.
electron.
isotope.
The natural abundance for boron isotopes is 19.9% B-10 and 80.1% B-11 . Calculate boron’s atomic mass.
10
10.801
5
1080.1
Hydrogen is 99% Hydrogen-1, 0.8% Hydrogen-2, and 0.2% Hydrogen-3. Calculate its average atomic mass.
1.012
1
4
101.2
