WorksheetsAtomic Structure and Electrons
Total questions: 40
Worksheet time: 40mins
Among ions and isotopes, which subatomic particle remains the same?
the number of protons
the number of electrons
the number of neutrons
the mass number
Which statement about electrons is true?
electrons attract one another
electrons are repelled by protons
electrons have the same magnitude as protons but are opposite in charge
electrons weigh the same as neutrons
Which of the following exhibits both properties of metals and non metals?
Mg
Zn
Si
Ne
Which element has similar chemical properties as Oxygen?
Sulfur
Neon
Berryllium
Phosphorus
How many neutrons are in the krypton atom above?
84
36
48
120
Which correctly describes the ion?
P= 17, E= 17, N= 19
P= 36, E= 17, N= 19
P= 17, E= 18, N= 19
P= 17, E= 18, N= 18
What is the correct electronic configuration of iron?
1s2 2s2 2p6 3s2 3p6 4s2 3d6
1s2 2s2 2p6 3s2 3p6 3d10 4s2
1s2 2s2 2p6 3s2 3p6 3d6
1s2 2p6 3p6 3d6
Which of the following elements has the highest ionization energy?
Sulfur
Magnesium
Silver
Iodine
What is the identity of the element with the following noble gas configuration [Kr] 5s2 4d10 5p2 ?
Tin
Silicon
Strontium
Tellurium
Which wavelength emits the greatest energy?
459 nm
610 nm
210 nm
765 nm
The orbital notation correctly identifies which element?
Sulfur
Chlorine
Aluminum
Neon
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
Which subatomic particle determines the identity of an element?
protons
neutrons
electrons
The electron is not included in the calculations for the atomic mass because
It has negative charge
It is located in the outer energy levels of the atom
Its mass is basically zero
It attracts neutral particles
What were J. J. Thomson's three contributions to the atomic theory?
Discovered the electron
Discovered the nucleus -did the gold foil experiment
Used the cathode ray tube in his discovery
Created a model of the atom with electrons moving around the nucleus in fixed orbits
Created the "plum pudding" model of the atom
What is Neils Bohr's contribution to the atomic theory?
Created the atomic theory
Created a model of the atom with electrons moving around the nucleus in a fixed orbits
Discovered that the proton had a positive charge
Believed that atoms of a given element are identical
Discovered the electron
What were Ernest Rutherford's three contributions to atomic theory?
Discovered that the atom is mostly empty space
Discovered the nucleus- did the gold foil experiment
Used the cathode ray tube in his discovery
Discovered the electron
Discovered that the proton had a positive charge
[Xe] 6s2 4f14 5d9
Which of the transition state below represents light emission with the greatest frequency?
n=1 → n=5
n= 4 → n=1
n= 4 → n=3
n= 2 → n=6
What does Pauli exclusion principle state ?
states that each electron occupies the lowest energy orbital available
states that -no two electrons in the same orbital can have the same spin
states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals
What is the electronic configuration of Fe2+?
1s22s22p63s23p63d6
1s22s22p63s23p63d8
1s22s22p63s23p64s23d4
1s22s22p63s23p64s23d6
As you move across the period of periodic table, atoms tend to get smaller because ______________.
the atoms have more mass.
the atoms have less mass
the atoms have more protons.
the atoms have less electrons.
As you move down the group of periodic table, atoms get bigger. This is because ____________.
The atoms have more mass.
The atoms have more protons.
The atoms have more energy levels
The atoms have more neutrons
What is meant by isolectronic?
Group of atoms or ions that have the same electronic configuration
Group of atoms or ions that have the same protonic configuration
Group of atoms or ions that have the same electrical properties
Group of atoms or ions that have the same electron charge
What is the example of species that are isolectronic?
Li+ and H+
S2- and O2-
Li+ and He
F- and Cl-
Which species is larger?
Ne
F-
Which species is smaller?
P3-
Cl-
Arrange these species in decreasing order of size.
F- , Na+ , Mg2+ , O2- , Al3+ , Ne
Al3+ > Mg2+ > Na+ > Ne > F- > O2-
O2- > F- > Ne > Na+ > Mg2+ > Al3+
Al3+ < Mg2+ < Na+ < Ne < F- < O2-
O2- < F- < Ne < Na+ < Mg2+ < Al3+
Arrange these species in increasing order of size.
Cl- , Ca2+ , S2- , Ar , K+
Ca2+ > K+ > Ar > Cl- > S2-
S2- > Cl- > Ar > K+ > Ca2+
Ca2+ < K+ < Ar < Cl- < S2-
S2- < Cl- < Ar < K+ < Ca2+
What is the average mass of this element?
I. 7735X II. 7733X III. 8137X IV. 8135 X
What are the steps for finding the Average Atomic Mass?
1) write given mass, 2) write given %, 3) % to decimal, 4) Mass x abundance decimal 5) Add
1) % to decimal, 2) write given %, 3)write given mass, 4) Mass x abundance decimal 5) Add
1) write given mass, 2) write given %, 3) % to decimal, 4) Mass divided by abundance decimal 5) Add
1) write given mass, 2) write given %, 3) % to decimal, 4) Mass x abundance decimal 5) Subtract
