FALSE
All noble gases have the same valence electron configuration. (T/F)
FALSE
An oxygen atom, having electron configuration 1s(2) 2s(2) 2p(4), forms a single bond with another oxygen atom.(T/F)
TRUE
A sigma bond is formed between two atoms when the valence atomic orbital of one atom overlaps end-to-end with that of the other atom.(T/F)
FALSE
All of the bond lengths in a compound having resonating structures are identical.(T/F)
FALSE
An expanded octet is possible using the p-orbital of an element.(T/F)
FALSE
The bond angle for a molecule with sp(3) hybridized atom is always 109.5�.(T/F)
TRUE
Hybrid orbitals of an atom are identical and contain one electron each.(T/F)
FALSE
The molecules H(2)O and CCl(4) are nonpolar, as the central atoms, O and C, respectively, are sp(3) hybridized.(T/F)
1
Fluorine belongs to group 7A. How many covalent bonds are formed between two fluorine atoms?
2
How many pi bonds are there in a triple covalent bond?
ate
The name of an oxyacid has the suffix -ic acid. What is the suffix of the oxyanion?
4
How many bond pairs of electrons exist in a molecule of ammonia?
BH3
Which of the following compounds is an exception to the octet rule?
180
A compound BeCl(2) uses sp hybrid orbitals of Be atom. Which of the following is the correct bond angle in the compound?
polar covalent
If the electronegativity of H is 2.20 and of Cl is 3.55, which type of bond is formed between H and Cl, when they form hydrogen chloride?
A hydrogen atom can form only one bond with another hydrogen atom. The outer electronic configuration of hydrogen is 1s1.
Two hydrogen atoms combine to form a hydrogen molecule. How many bonds can a hydrogen atom form with another hydrogen atom and what is the outer electronic configuration of hydrogen?
The electron configuration of nitrogen is 1s1 2s1 2p3. There is only one lone pair of electrons in nitrogen in an amonia molecule.
Ammonia is formed with one nitrogen and three hydrogen atoms. What is the electron configuration of nitrogen? How many lone pairs of electrons are present in nitrogen in an ammonia molecule?
The nitrogen molecule has the strongest covalent bond and the shortest bond length.
There exists a direct relationship between the energy needed to break a bond and the bond length. The bond dissociation energy of fluorine is 159 kJ/mol, oxygen is 498 kJ/mol, and nitrogen is 945 kJ/mol. Which molecule has the strongest covalent bond and the shortest bond length?
There are two lone pairs of electrons in the central atom and 36 valence electrons.
Xenon forms four bonds with fluorine in which it violates the octet rule. Determine the number of lone pairs of electrons in the central atom and the total number of valence electrons.
Yes, the compound follows the octet rule.
Boron forms a compound with hydrogen having formula BH(3). Does the compound follow the octet rule?
In a water molecule, the central oxygen atom forms two single covalent bonds with each hydrogen atom. The central atom has two lone pairs of electrons that occupy more space than the paired electrons. This results in the bent shape of water molecules with
Why does a water molecule have a bent shape with a bond angle of 104.5�?
The contral atom, P, expands its octet by involving higher energy orbitals to form PCl(5). Therefore, PCl(5) is an exception to the octet rule, while PCl(3) is not.
Why is PCl(5) an exception to the octet rule, while PCl(3) is not?
There are two lone pairs of electrons and there are four electrons involved in the process of bonding with the hydrogen atoms.
The electron configuration of an element is 1s(2) 2s(2) 2p(4). It forms a compound having two bonds with hydrogen atoms. Determine the number of lone pairs of electrons and the number of electrons that are involved in the process of bonding with the hydrogen atoms?
Two pairs of electrons are needed to form bonds in the compound. The central element has two lone pairs of electrons.
Hydrogen selenide has selenium and hydrogen atoms. How many pairs of electrons are needed to form bonds in the compound? How many lone pairs of electrons does the central element possess?