which pair of atom will combine chemically to give an ionic compound?
a)H and U
b)O and S
C)F and CA
d)NA and CL
I don't know a CA, NA, or CL.
Look up the electronegativities of each element pair. Subtract the larger from the smaller. If the difference is 1.8 or so higher it is classified as an ionic bond.
The correct answer is option d) Na and Cl.
Sodium (Na) is a metal, and chlorine (Cl) is a non-metal. When they combine, Na donates an electron to Cl, resulting in the formation of sodium ion (Na+) and chloride ion (Cl-). These ions are then attracted to each other due to opposite charges, forming an ionic compound known as sodium chloride (NaCl).
To determine which pair of atoms will combine chemically to give an ionic compound, you need to understand the concept of ionic bonding. Ionic compounds are formed when one atom donates electrons to another atom. This results in the formation of positively charged ions (cations) and negatively charged ions (anions), which are held together by electrostatic forces.
Now let's analyze the given pairs of atoms:
a) H and U: Hydrogen (H) is a nonmetal, and Uranium (U) is a metal. Nonmetals generally gain electrons to form negatively charged anions, while metals tend to lose electrons to form positively charged cations. Since neither hydrogen nor uranium exhibits this behavior, this pair is unlikely to form an ionic compound.
b) O and S: Oxygen (O) is a nonmetal, while Sulfur (S) is also a nonmetal. Both nonmetals generally gain electrons to achieve a stable electron configuration. Therefore, this pair is unlikely to form an ionic compound.
c) F and Ca: Fluorine (F) is a highly electronegative nonmetal, while Calcium (Ca) is a metal. Fluorine readily gains an electron to form a fluoride ion (F-) with a charge of -1, while Calcium readily loses two electrons to form a calcium ion (Ca2+) with a charge of +2. Since the charges are opposite, this pair is likely to combine chemically and form an ionic compound.
d) Na and Cl: Sodium (Na) is a metal, while Chlorine (Cl) is a nonmetal. Sodium readily loses an electron to form a sodium ion (Na+) with a charge of +1, while Chlorine readily gains an electron to form a chloride ion (Cl-) with a charge of -1. Since the charges are opposite, this pair is also likely to combine chemically and form an ionic compound.
Therefore, the pairs of atoms that are most likely to combine chemically to give an ionic compound are c) F and Ca and d) Na and Cl.