review progress\nquestion 8 of 15\nthe noble gas is most likely element\nchoose answer 1. of the four…
review progress\nquestion 8 of 15\nthe noble gas is most likely element\nchoose answer 1. of the four, element\nhas the\nlargest atomic radius. the element which would form cations with a 2+ charge is\nchoose answer 2\nchoose answer 3\nkj/mol\nelement 1\nelement 2\nelement 3\nelement 4\n812\n376\n503\n1037\n1862\n2234\n965\n2064\n2634\n3203\n3458\n2837\nchemistry hkoenig - 02 - 06 (lms)\ninvestigation test: the periodic table (lms graded)
Answer
Explanation:
Step1: Recall noble - gas property
Noble gases have full - valence electron shells. They have relatively high first ionization energies. Among the given elements, the one with the highest first ionization energy is likely to be the noble gas. Element 1 has the highest first ionization energy (812 kJ/mol), so it is most likely the noble gas.
Step2: Analyze cation formation
To form a 2+ cation, an element needs to lose two electrons. Elements with relatively low first and second ionization energies and a large jump in the third ionization energy are likely to form 2+ cations. Element 3 has a relatively low first (503 kJ/mol) and second (965 kJ/mol) ionization energy and a large jump to the third (3458 kJ/mol), so it is likely to form a 2+ cation.
Step3: Analyze atomic radius trend
Atomic radius generally decreases across a period and increases down a group. Elements with lower ionization energies are usually larger in size. Element 3 has relatively low ionization energies, so it is likely to have the largest atomic radius.
Answer:
Answer 1: Element 1 Answer 2: Element 3 Answer 3: Element 3