WorksheetsStudying Atoms and Atomic Structure
Total questions: 15
Worksheet time: 9mins
Dalton's theory did NOT include which of the following points?
All elements are composed of atoms.
Most of the atom's mass is in its nucleus.
Compounds contain atoms of more than one element.
In a specific compound, atoms of different elements always combine in the same way.
JJ Thompson's experiments provided the first evidence of
atoms
a nucleus
subatomic particles
elements
The concept of an atom as a small particle of matter that cannot be divided was proposed by the ancient Greek philosopher, Democritus.
True
False
In which way do isotopes of an element differ?
Number of electrons in the atom.
Number of protons in the atom.
Number of neutrons in the atom.
Net charge of the atom.
Of the three subatomic particles that form the atom, the one with the smallest mass is the neutron.
True
False
Rutherford’s gold foil experiment provided evidence forwhich of the following statements?
Negative and positive charges are spread evenly throughout an atom.
Alpha particles have a positive charge.
Gold is not as dense as previously thought.
There is a dense, positively charged mass in the center of an atom.
Which statement about subatomic particles is true?
Protons, neutrons, and electrons all have the same mass.
Unlike protons and neutrons, electrons have no mass.
Neutrons have no charge and no mass.
An electron has far less mass than either a proton or a neutron.
Which statement is true about Oxygen-17 and Oxygen-18?
They do not have the same number of protons.
Their atoms have an identical mass.
They are isotopes of oxygen.
They have the same mass number.
What do scientists use to predict the location of electrons in atoms?
Probability
Geometry
Algebra
Ratios and Proportions
What is the charge of a neutron?
Positive
Negative
Neutral
Variable
Which model of the atom first introduced the concept of electron orbits?
Dalton's Model
Bohr's Model
Thomson's Model
Rutherford's Model
Which of the following statements about isotopes is true?
Isotopes have different numbers of electrons.
Isotopes have different numbers of neutrons.
Isotopes have different atomic numbers.
Isotopes have different numbers of protons.
What is the primary difference between a proton and a neutron?
Protons have a negative charge, while neutrons have a positive charge.
Protons are found outside the nucleus, while neutrons are inside.
Protons have no mass, while neutrons have mass.
Protons have a positive charge, while neutrons have no charge.
Which subatomic particle determines the identity of an element?
Electron
Neutron
Proton
Quark
What is the significance of the atomic number in the periodic table?
It determines the isotope of the element.
It shows the total mass of the atom.
It indicates the number of protons in an atom.
It represents the number of neutrons in an atom.
