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WorksheetsAtomic Structure and Charge Concepts
Total questions: 58
Worksheet time: 1hrs 24mins
A neutral, or uncharged, atom definitely has the same number of
neutrons and protons.
protons and electrons.
electrons and neutrons.
protons, neutrons, and electrons.
Which parts of an atom are in the nucleus?
neutrons
only neutrons and protons
electrons and protons
electrons and neutrons
An atom that has the same number of protons and electrons has
no charge.
a positive charge.
a negative charge.
an isotope charge
An atom with 9 electrons and 12 protons has a charge of
2+
3+
3-
2-
An atom containing 27 electrons, 29 neutrons, and 27 protons has a charge of
2+
2-
no charge
1+
Where are ELECTRONS located?
nucleus
energy levels
outside the atom
The atomic number of an atom is defined as the:
number of electrons in the outermost energy level.
total number of energy shells.
total number of electrons and neutrons.
number of protons in the atomic nucleus.
An atom's nucleus is composed of:
neutrons only.
protons and neutrons.
protons only.
Polar covalent bonds form when:
more than one pair of electrons is shared.
electrons are shared unequally between atoms.
atoms from two molecules are attracted to each other.
1. Which of the following results from a transfer of electron(s) between atoms?
ionic bond
nonpolar covalent bond
electron-proton interaction
which of the following best explains the attraction of water molecules to each other?
hydrogen bond
nonpolar covalent bond
electron proton interaction
Which is the best definition of an atom?
The smallest unit of a substance that maintains its properties.
The smallest unit of an element that maintains its properties.
A substance that cannot be broken down in to simpler substances.
Any sample that has definite chemical and physical properties.
The [electric] charge of a proton is
-2
0
+1
-1
What information can you get from the atomic number of an element?
The number of protons.
The number of neutrons.
the number of particles in the nucleus.
the number of electrons only.
What is the mass number of this atom?
1
3
4
7
What is the atomic number of Barium, Ba? (enlarge the periodic table)
20
38
56
88
An element has the mass number 12 and atomic number 6. The number of neutrons in it is:
6
10
4
8
What is the charge of an atom with 10 protons and 13 electrons?
-3
+3
neutral
+23
What is the mass number of the listed element?
6
14
8
20
How many neutrons are in this atom?
20
6
8
14
Smallest piece of an element that is capable of independent existence.
Molecule
Formula Unit
Ion
Atom
Atoms of the same element with different numbers of neutrons.
Formula Unit
Isotopes
Isomers
Protons
How many neutrons are there in an atom of Lithium-7?
4
3
7
10
What is the name for the total number of protons in the nucleus of an atom?
Atomic Number
Mass Number
Isotope Number
Average Atomic Mass
What is the name for the total of all of the protons and neutrons in the nucleus of an atom?
Atomic Number
Isotope Number
Mass Number
Average Atomic Mass
How many protons are in an atom of Calcium?
40
40.08
20
There are no protons in calcium
How many electrons are there in an atom of Sodium-23
11
12
23
34
Which of the following IS a part of Dalton's Atomic Theory?
Atoms are made up of protons and neutrons.
Electrons are lost or gained during chemical changes
Atoms are indivisible
Atoms are positively charged
What is the mass number of Copper-63?
29
63
34
92
This scientist discovered the nucleus of an atom.
Dalton
Democritus
Mendeleev
Rutherford
Which of the following is a reason why Rutherford concluded that the nucleus is positive?
Most of the alpha particles missed the nucleus
Most of the alpha particles hit the nucleus
The alpha particles bounced off of the nucleus
The alpha particles stuck to the nucleus
How many neutrons are in an atom of Gold - 195?
79
116
195
274
Which of the following is the "standard" when determining the relative mass of an element?
Carbon-12
Carbon-14
Oxygen-16
Hydrogen-1
What is the name for a positive ion?
Cation
Anion
Electron
Polyatomic Ion
Which of the following CANNOT be found on the periodic table?
Atomic Number
Average Atomic Mass
Element Symbol
Mass Number
Which of the following is a metal?
Calcium
Hydrogen
Nitrogen
Carbon
Which of the following is a halogen?
Sodium
Barium
Iodine
Krypton
Which of the following elements has an octet?
Iodine
Sodium
Copper
Krypton
Which of the following is the alkaline earth metal in period 2?
Beryllium
Magnesium
Barium
Strontium
Which of the following has 50 protons in the nucleus?
Calcium
Gold
Tin
Lead
Why did Ernest Rutherford and his colleagues perform the Gold-Foil Experiment?
They wanted to test and confirm the Plum-Pudding model
They wanted to test John Dalton's Model
They were looking for electrons
They wanted to come up with their own Atomic Model
This picture best represents ___________________ atomic model.
Thomson's
Dalton's
Bohr's
Chadwick's
Which of the following is/are conclusions based on Rutherford’s gold foil experiment?
Atom is mostly empty space
The nucleus is positively charged
The atom has a small dense nucleus
All answers are correct
What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?
Ernest Rutherford, JJ Thomson, John Dalton, & Democritus
JJ Thomson, John Dalton, Ernest Rutherford, & Democritus
Democritus, John Dalton, JJ Thomson, Ernest Rutherford.
John Dalton, JJ Thomson, Democritus, & Ernest Rutherford
What was J. J. Thomson's contribution to the atomic theory?
Discovered the electron
Discovered the nucleus -did the gold foil experiment
Created a model of the atom with electrons moving around the nucleus in fixed orbits
Discovered the neutron
What was Ernest Rutherford's contributions to atomic theory?
Discovered the nucleus- did the gold foil experiment
Used the cathode ray tube in his discovery
Discovered the electron
Discovered the neutron
