WorksheetsAtomic Structure A/B
Total questions: 25
Worksheet time: 13mins
atom
the smallest particle of an element that retains the properties of that element
a positively charged subatomic particle
a negatively charged subatomic particle
a subatomic particle with no charge
the central part of an atom, containing protons and neutrons
proton
the smallest particle of an element that retains the properties of that element
a positively charged subatomic particle
a negatively charged subatomic particle
a subatomic particle with no charge
the central part of an atom, containing protons and neutrons
electron
the smallest particle of an element that retains the properties of that element
a positively charged subatomic particle
a negatively charged subatomic particle
a subatomic particle with no charge
the central part of an atom, containing protons and neutrons
neutron
the smallest particle of an element that retains the properties of that element
a positively charged subatomic particle
a negatively charged subatomic particle
a subatomic particle with no charge in the nucleus
the central part of an atom, containing protons and neutrons
nucleus
the smallest particle of an element that retains the properties of that element
a positively charged subatomic particle
a negatively charged subatomic particle
a subatomic particle with no charge in the nucleus
the central part of an atom, containing protons and neutrons
isotope
atoms with the same number of protons, but different numbers of neutrons in the nucleus of an atom
the total number of protons and neutrons in the nucleus of an atom
the number of protons in the nucleus of an element
the weighted average of the masses of the isotopes of an element
one-twelfth the mass of a carbon atom having six protons and six neutrons
mass number
atoms with the same number of protons, but different numbers of neutrons in the nucleus of an atom
the total number of protons and neutrons in the nucleus of an atom
the number of protons in the nucleus of an element
the weighted average of the masses of the isotopes of an element
one-twelfth the mass of a carbon atom having six protons and six neutrons
atomic number
atoms with the same number of protons, but different numbers of neutrons in the nucleus of an atom
the total number of protons and neutrons in the nucleus of an atom
the number of protons in the nucleus of an element
the weighted average of the masses of the isotopes of an element
one-twelfth the mass of a carbon atom having six protons and six neutrons
atomic mass
atoms with the same number of protons, but different numbers of neutrons in the nucleus of an atom
the total number of protons and neutrons in the nucleus of an atom
the number of protons in the nucleus of an element
the weighted average of the masses of the isotopes of an element
one-twelfth the mass of a carbon atom having six protons and six neutrons
atomic mass unit
atoms with the same number of protons, but different numbers of neutrons in the nucleus of an atom
the total number of protons and neutrons in the nucleus of an atom
the number of protons in the nucleus of an element
the weighted average of the masses of the isotopes of an element
one-twelfth the mass of a carbon atom having six protons and six neutrons
Who was the man who lived from 460B.C.–370B.C. and was among the first to suggest the idea of atoms?
Atomos
Dalton
Democritus
Thomson
Which of the following was NOT among Democritus’s ideas?
Matter consists of tiny particles called atoms
Atoms are indivisible.
Atoms retain their identity in a chemical reaction.
Atoms are indestructible
The smallest particle of an element that retains the properties of that element is a(n) ____
atom
electron
proton
neutron
Dalton's atomic theory included which idea?
All atoms of all elements are the same size.
Atoms of different elements always combine in one-to-one ratios
Atoms of the same element are always identical.
Individual atoms can be seen with a microscope.
Which of the following is NOT a part of Dalton's atomic theory?
All elements are composed of atoms
Atoms are always in motion
Atoms of the same element are identical.
Atoms that combine do so in simple whole-number ratios.
Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago?
Atoms are tiny indivisible particles.
Atoms of the same element are identical.
Compounds are made by combining atoms.
Atoms of different elements can combine with one another in simple whole number ratios
The comparison of the number of atoms in a copper coin the size of a penny with the number of people on Earth is made to illustrate which of the following?
that atoms are indivisible
that atoms are very small
that atoms are very large
that in a copper penny, there is one atom for every person on Earth
Dalton hypothesized that atoms are indivisible and that all atoms of an element are identical. It is now known that ____.
all of Dalton's hypotheses are correct
atoms of an element can have different numbers of protons
atoms are divisible
all atoms of an element are not identical but they must all have the same mass
Why did J. J. Thomson reason that electrons must be a part of the atoms of all elements?
Cathode rays are negatively-charged particles.
Cathode rays can be deflected by magnets.
An electron is 2000 times lighter than a hydrogen atom.
Charge-to-mass ratio of electrons was the same, regardless of the gas used.
Which of the following is true about subatomic particles?
Electrons are negatively charged and are the heaviest subatomic particle
Protons are positively charged and the lightest subatomic particle.
Neutrons have no charge and are the lightest subatomic particle.
The mass of a neutron nearly equals the mass of a proton.
Who conducted experiments to determine the quantity of charge carried by an electron?
Rutherford
Millikan
Dalton
Thomson
What is the relative mass of an electron?
1/1840 the mass of a hydrogen atom
1/1840 the mass of a neutron + proton
1/1840 the mass of a C-12 atom
1/1840 the mass of an alpha particle
Which hypothesis led to the discovery of the proton?
When a neutral hydrogen atom loses an electron, a positively-charged particle should remain
A proton should be 1840 times heavier than an electron.
.Cathode rays should be attracted to a positively-charged plate.
The nucleus of an atom should contain neutrons
Which of the following is correct concerning subatomic particles
The electron was discovered by Goldstein in 1886.
The neutron was discovered by Chadwick in 1932
The proton was discovered by Thomson in 1880.
Cathode rays were found to be made of protons.
The range in size of most atomic radii is approximately ____.
2 to 5 cm
2 to 5 mm
5 x 10-11 m to 2x 10-10 m
5 x10 -21 m to 2 x 10-20 m
