Remedial Test Flashcards
An atom of the most common isotope of gold 197Au, has ___ protons, ___ neutrons, and ___ electrons.
79, 118, 79
There are ___ electrons, ___ protons, and ___ neutrons in an atom of 123/54 Xe.
132, 132, 54
Which pair of atoms constitutes a pair of isotopes of the same element?
14/6 x 12/6 x
All atoms of a given element have the same ___.
Number of protons.
The ground state electron configuration of Ga is ___
1s22s22p64s23d10,4p1.
The ground state electron configuration of the element ___ is [Kr] 5s1,4d5
Cr
The ground state electron configuration of the element [Ar] 4s1,3d5
Fe
Which of the following elements has ground state electron configuration different from the predicted one?
Xe
There are ___ orbitals in the second shell.
4
Which of the following has eight valence electrons?
All of the above (Kr, Ti, Cl, Na)
Of the molecules below, the bond in ___ is the most polar.
All of the above (Hbr, HI, HCl, HF)
The Lewis structure of N2H2 shows ___
Each nitrogen has two nonbonding electronic pairs.
The type of bonding where electrons are transferred to another element and ions are formed.
Ionic bonding.
There are ___ paired and ___ unpaired electrons in the Lewis symbol for a fluorine atom.
4, 1
The basis of the VSEPR model of molecular bonding is ___.
Electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsion.
