Suppose you are trying to find the identity of an unknown pure substance. the valence electrons of the substance's atoms feel an effective nuclear charge of +1. if this substance's atoms have larger radii than potassium (k) atoms, what other characteristics would you expect the substance to exhibit? ait would have higher ionization energies than k and a higher electronegativity value than k. bit would have higher ionization energies than k and a lower electronegativity value than k. cit would have lower ionization energies than k and a higher electronegativity value than k. dit would have lower ionization energies than k and a lower electronegativity value than k.

Correct option is (D).

Explanation:

Given that unknown element has larger atomic radii than potassium atoms and its valence electrons feel an effective nuclear charge of +1 which means that this unknown element belongs to group(I) of the periodic table.

In periodic table:

So,It would have lower ionization energies than K and a lower electronegativity value than K.

chemistry sucks a**

explanation:

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.