Question

A new element has recently been discovered but not yet named. Call it element X.

63

        X

33

a.) What is the mass number of element X?

b.) What is the atomic number of element X?

c.) How many neutrons does element X have?

d.) How many electrons does element X have?

e.) How many protons does element X have?

f.) How many electrons does element X have in the valence shell?

g.) Is element X more electronegative or more electropositive?

Answer 1

a] Mass no is 63

b] atomic no is 33

c] nutron no. = 63-33 = 30

d] electron = 33

e] proton = 33

f] electron configuration - [Ar] 3d¹⁰4s²4p³, So, valance cell electron = 2+3 = 5

g] it can not say , electronegativity is relative property. more electronegative or more electropositive property will be relative to other elements.