nj Flashcards
(18 cards)
Which of the following sets of atoms can be joined by a covalent bond?
S and F
Why do atoms form ionic and covalent bonds?
To attain a noble-gas electron configuration
Which of the following elements does not want to have eight valence electrons?
Hydrogen
An ionic compound is:
All of the above (composed of anions and cations, held together by ionic bonds, composed of metals and non-metals)
Ionic compounds are normally in which physical state at room temperature?
Solid
Which is NOT a characteristic of most ionic compounds?
They have low melting points
Why do atoms share electrons in covalent bonds?
To attain a noble-gas electron configuration
What is the name given to the pairs of valence electrons that do not participate in bonding in covalent molecules?
Unshared pair
What is the total number of covalent bonds normally associated with a single carbon atom in a compound?
4
Which of the following pairs of elements is most likely to form an ionic compound?
Magnesium and chlorine
Which would be the best conductor of electricity?
NaCl
Which of the following molecules is polar?
H₂O
Which of the following molecules is non-polar?
CF₄
Which of the following molecules has a tetrahedral shape?
CH₄
Atoms situate themselves around a central atom in a molecule using which theory?
