Which of the following pairs of atoms would you expect to combine chemically to form an ionic compound?

A.Li and S
B.O and S
C.Al and O
d.F and Cl
e.I and K
F.H and N

Which of the following pairs of elements will not form ionic compound.

a.sulfur and oxygen
b.sodium and calcium
c.sodium and sulfur
d.oxygen and chlorine

K and I have a significant difference of electronegativity. S and O do not.

I will also say sulfur and oxygen

O and s

Ah, chemistry, the science of bonding and reactions! Let's see which of these atom pairs would make for an electrifying combination.

For the first question, the pair that would most likely form an ionic compound is F and Cl. They're from opposite sides of the periodic table and have high electronegativity differences, like a classic "opposites attract" scenario.

And now, for the second question, the cheeky pair that would not form an ionic compound is sodium and sulfur. They have similar electronegativity levels, so they're more likely to shake hands and form a covalent bond instead of going for an electronegative romance.

Hope that helps lighten up your chemistry knowledge a bit!

The pair of atoms that would most likely combine chemically to form an ionic compound is:

C. Al and O (Aluminum and Oxygen)

Aluminum has a relatively low electronegativity, while Oxygen has a relatively high electronegativity. This difference in electronegativity would result in the transfer of electrons from Aluminum to Oxygen, forming an ionic compound.

The pair of elements that will not form an ionic compound is:

A. Sulfur and Oxygen

Both Sulfur and Oxygen have similar electronegativities, and they are both nonmetals. In general, nonmetals tend to form covalent bonds rather than ionic bonds. Therefore, sulfur and oxygen would most likely form a covalent compound rather than an ionic compound.

To determine which pairs of atoms would combine chemically to form an ionic compound, we need to consider their electronegativity difference. Electronegativity is a measure of an atom's tendency to attract electrons towards itself in a chemical bond.

In general, when the electronegativity difference between two atoms is large, they are more likely to form an ionic compound, where one atom completely transfers electrons to the other. On the other hand, when the electronegativity difference is small, atoms are more likely to form covalent compounds, where they share electrons.

Let's analyze the given pairs of atoms:

A. Li and S: Lithium (Li) and Sulfur (S) have a significant electronegativity difference, so they are likely to form an ionic compound.

B. O and S: Oxygen (O) and Sulfur (S) have similar electronegativity, so they are not likely to form an ionic compound.

C. Al and O: Aluminum (Al) and Oxygen (O) have a significant electronegativity difference, so they are likely to form an ionic compound.

D. F and Cl: Fluorine (F) and Chlorine (Cl) have a small electronegativity difference, so they are not likely to form an ionic compound.

E. I and K: Iodine (I) and Potassium (K) have a significant electronegativity difference, so they are likely to form an ionic compound.

F. H and N: Hydrogen (H) and Nitrogen (N) have a small electronegativity difference, so they are not likely to form an ionic compound.

Therefore, the pairs of atoms that would be expected to combine chemically to form an ionic compound are A.Li and S, C.Al and O, and E.I and K.

To answer the second question regarding which pairs of elements will not form an ionic compound:

A. Sulfur (S) and Oxygen (O): As discussed earlier, S and O have similar electronegativities, so they are not likely to form an ionic compound.

B. Sodium (Na) and Calcium (Ca): Sodium and Calcium also have similar electronegativities, so they are not likely to form an ionic compound.

C. Sodium (Na) and Sulfur (S): Sodium and Sulfur have a significant electronegativity difference, so they are likely to form an ionic compound.

D. Oxygen (O) and Chlorine (Cl): Oxygen and Chlorine have similar electronegativities, so they are not likely to form an ionic compound.

Therefore, the pair of elements that will not form an ionic compound is B. Sodium and Calcium.

Remember that the determination of whether elements will form an ionic or covalent compound is not solely based on electronegativity differences. Other factors such as the size and charge of the atoms also play a role in compound formation.