Which of the following best describes a pair of elements that will form an ionic bond?

c and h: hydrogen easily loses electrons, and carbon gains them.

li and o: oxygen easily loses electrons, and lithium gains them.

p and cl: phosphorus easily loses electrons, and chlorine gains them.

ca and br: calcium easily loses electrons, and bromine gains them

Option (d) is the correct answer.

Explanation:

An ionic bond is formed between a metal and a non-metal as metals have more number of electrons and non-metals are electron deficient in nature.

So, in order to complete their octet metals lose electrons and non-metals gain them.

For example, calcium and bromine will form an ionic bond because being a metal calcium will lose electrons and bromine being a non-metal will gain electrons.

Thus, we can conclude that out of the given options, Ca and Br: Calcium easily loses electrons, and bromine gains them best describes a pair of elements that will form an ionic bond.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.