WorksheetsAtomic Theory Quiz
Total questions: 70
Worksheet time: 35mins
Who presented the atomic theory in 1803?
Ernest Rutherford
Niels Bohr
John Dalton
J.J. Thomson
What are the key ideas of John Dalton's atomic theory? (Choose three)
Atoms can be created, destroyed, and divided
Atoms of the same element are identical
Different atoms can combine to form new substances
Atoms of different elements are the same
Matter is made of atoms which are tiny particles
What does the development of atomic models over time demonstrate about science?
Scientific models never change
Science ignores experimental evidence
New experimental evidence may lead to a scientific model being changed or replaced
Theories once disproved cannot be reconsidered
Which of the following is NOT true about Dalton's atomic theory?
It was based on three key ideas
It was completely correct and never disproved
It included the idea that atoms of the same element are identical
It proposed that different atoms combine to form new substances
Which atomic model was proposed by John Dalton?
Plum Pudding Model
Rutherford Model
Billiard Ball Model
Quantum Mechanical Model
In what year was the Bohr Model introduced?
1803
1897
1913
1926
What is the name given to J.J. Thomson's atomic model?
Billiard Ball Model
Plum Pudding Model
Bohr Model
Quantum Mechanical Model
During which period was the Quantum Mechanical Model of the atom developed?
1800s
1900s
1913
1926
Who is credited with the development of the Quantum Mechanical Model in 1926?
Dalton
Thomson
Rutherford
Schrödinger
Who discovered the electron in 1897?
Ernest Rutherford
J.J. Thomson
Geiger and Marsden
Niels Bohr
What was the main postulate of Thomson's model of the atom?
The atom consists mainly of empty space with the nucleus at the centre.
Atoms are indivisible particles.
Negative electrons are spread throughout soft globules of positively charged material.
Most of an atom's mass is concentrated in the nucleus.
What did Rutherford's gold foil experiment lead him to conclude?
Electrons are negatively charged particles.
Atoms are indivisible.
Most of an atom's mass is concentrated in a region of space at the centre of the atom called the nucleus.
The atom is a uniform sphere of positive charge with electrons embedded in it.
What is Rutherford's model of the atom known as?
The plum pudding model
The nuclear model
The quantum mechanical model
The Bohr model
According to Rutherford's model, how do electrons exist in an atom?
Electrons are stationary within the atom.
Electrons orbit in paths around the nucleus.
Electrons are spread evenly throughout the atom.
Electrons are embedded in a positively charged sphere.
What happens to a beam of electrons when it is exposed to a positively charged metal plate?
The electrons are repelled by the positively charged plate.
The electrons do not interact with the positively charged plate.
The electrons are attracted to the positively charged plate.
The electrons are neutralized by the positively charged plate.
What does the diagram represent in the context of atomic structure?
A neutron
A spherical cloud of negative charge
A spherical cloud of positive charge
A proton
According to the diagram, what are the negatively charged particles in an atom called?
Protons
Neutrons
Electrons
Positrons
What are the negatively charged particles in an atom called?
Protons
Neutrons
Electrons
Nuclei
Where is the nucleus located in an atom?
Outside the orbits
Inside the electrons
At the center of the atom
In the orbit
What does the nucleus of an atom contain?
Electrons and orbits
Only electrons
Protons and neutrons
Only protons
What is the path taken by electrons around the nucleus called?
Nucleus path
Electron path
Orbit
Electron road
What is the atomic symbol for the element with atomic number 12?
Al
Si
Mg
S
Which element has the atomic number 79?
Gold (Au)
Silver (Ag)
Platinum (Pt)
Mercury (Hg)
According to the key in the Periodic Table of Elements, what does the number below the element symbol represent?
Atomic mass
Number of neutrons
Number of electrons
Atomic number
Which of the following elements is a noble gas?
Ne
Fe
H
Na
What is the atomic symbol for the element with atomic number 1?
O
H
He
N
What is the atomic symbol for Helium?
He
H
Ne
Ho
Which element has the atomic number 12?
Carbon
Magnesium
Oxygen
Silicon
What is the relative atomic mass of Carbon as shown in the Periodic Table?
6
12
14
13
Which of the following elements is not correctly matched with its atomic symbol?
Sodium - Na
Potassium - K
Iron - Fe
Silver - Ag
According to the key in the Periodic Table, what does the number below the element symbol represent?
Relative atomic mass
Atomic (proton) number
Number of neutrons
Number of electrons
What information is typically included for each element on the Periodic Table of Elements as shown in the image?
Element name and symbol only
Element name, symbol, and atomic mass
Element name, symbol, atomic mass, and electron configuration
Element name, symbol, atomic mass, and atomic (proton) number
Which elements are omitted from the Periodic Table of Elements in the image?
The Noble gases
The Alkali metals
The Lanthanides and the Actinides
The Transition metals
Which group in the periodic table is known as the alkali metals?
Group 1
Group 2
Group 17
Group 18
What are the elements in Group 17 commonly referred to as?
Noble gases
Halogens
Alkali earth metals
Transition metals
Which of the following elements is a noble gas?
Nitrogen (N)
Oxygen (O)
Chlorine (Cl)
Neon (Ne)
Which group contains the transition metals?
Between Group 2 and Group 3
Between Group 3 and Group 4
Between Group 12 and Group 13
Between Group 17 and Group 18
What particles are found in the nucleus of an atom?
Electrons and protons
Neutrons and electrons
Protons and neutrons
Protons, neutrons, and electrons
How many electrons does a neutral sodium atom have?
11
12
10
13
What is the electron configuration of sodium?
[Ne] 3s2
[Ne] 3s1
[Ne] 2s2 2p6
[Ar] 4s1
What is the atomic number of sodium?
10
11
12
13
What is the relative charge of a proton?
+1
0
-1
+2
Which sub-atomic particle has a relative mass of 1 and no charge?
Proton
Neutron
Electron
Positron
What is the relative charge of an electron?
+1
0
-1
+2
Which sub-atomic particle is represented by the outer circles in the diagram?
Proton
Neutron
Electron
Nucleus
What is the relative mass of a neutron?
0
1
0.0005
1/1836
What is the relative charge of an electron?
+1
0
-1
1/1836
Which sub-atomic particle has a relative mass of 0.0005 or 1/1836?
Proton
Neutron
Electron
None of the above
What does the nucleus of an atom consist of?
Protons only
Electrons only
Protons and electrons
Protons and neutrons
Where are electrons located in an atom?
In the nucleus
In shells around the nucleus
Outside the atom
In the center of the nucleus
What is the atomic number of the element Na (Sodium)?
23
11
3
7
How many protons does the element Li (Lithium) have?
3
7
11
23
What is the mass number of the element Na (Sodium)?
3
7
11
23
Based on the information given for Li (Lithium), what would be its mass number if it has 4 neutrons?
3
6
7
11
What is the atomic number of Lithium (Li)?
3
7
11
23
How many protons does Sodium (Na) have?
11
23
3
7
What is the mass number of Lithium (Li)?
3
7
11
23
Based on the information given for Sodium (Na), what is the number of neutrons in its nucleus?
11
12
23
34
What is the atomic number of Argon (Ar)?
18
19
20
40
What is the mass number of Argon (Ar)?
18
19
20
40
How many protons does Potassium (K) have?
18
19
20
40
How many electrons does Potassium (K) have?
18
19
20
40
What is the atomic number of Uranium-235 (235U)?
92
235
143
238
What is the atomic number of Uranium-238 (238U)?
92
235
143
238
What is the atomic number of Argon (Ar)?
18
19
20
40
How many protons does Potassium (K) have?
18
19
20
40
What is the mass number of Argon (Ar)?
18
19
20
40
How many electrons does Potassium (K) have?
18
19
20
40
Which of the following isotopes of Uranium has a mass number of 235?
235U
238U
Both 235U and 238U
Neither 235U nor 238U
Which of the following isotopes of Uranium has a mass number of 238?
235U
238U
Both 235U and 238U
Neither 235U nor 238U
