WorksheetsChem The Atom Review
Total questions: 14
Worksheet time: 7mins
Compared to the energy and charge of the electrons in the first shell of a Be atom, the electrons in the second shell of this atom have
less energy and the same charge
less energy and a different charge
more energy and the same charge
more energy and a different charge
Base your answer on the bright-line spectra produced by four elements and the spectrum of a mixture of elements represented in the diagram.
Each line in the spectra represents the energy
absorbed as an atom loses an electron
absorbed as an atom gains an electron
released as an electron moves from a lower energy state to a higher energy state
released as an electron moves from a higher energy state to a lower energy state.
Which elements are present in the mixture?
D and A
D and Z
X and A
X and Z
Which electron transition in an excited atom results in a release of energy?
first shell to the third shell
second shell to the fourth shell
third shell to the fourth shell
fourth shell to the second shell
A specific amount of energy is emitted when excited electrons in an atom in a sample of an element return to the ground state. The emitted energy can be used to determine the
mass of the sample
volume of the sample
identity of the element
number of moles of the element
During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms
are lost by the atoms
are gained by the atoms
return to lower energy states within the atoms
move to higher energy states within the atoms
What must occur when an electron in an atom returns from a higher energy level state to a lower energy state?
A specific amount of energy is released.
A random amount of energy is released.
The atom undergoes transmutation.
The atom spontaneously decays.
The isotopes K-37 and K-42 have the same
decay mode
bright-line spectrum
mass number of their atoms
total number of neutrons in their atoms
What is the total number of valence electrons in an atom of germanium in the ground state?
8
2
14
4
What is the electron configuration of a sulfur atom in the ground state?
2-4
2-6
2-8-4
2-8-6
Which electron configuration represents a potassium atom in the excited state?
2-7-6
2-8-5
2-8-8-1
2-8-7-2
When compared with the energy of an electron in the first shell of a carbon atom, the energy of an electron in the second shell of a carbon atom is
less
the same
greater
all of these
As a chlorine atom becomes a negative ion, the atom
gains an electron and its radius increases
gains an electron and its radius decreases
loses an electron and its radius increases
loses an electron and its radius decreases
A strontium atom differs from a strontium ion in that the atom has a greater
number of electrons
number of protons
atomic number
mass number
