Question

type the element in each list with the largest atomic mass:

Explanation:

Step1: Recall atomic - mass trend

Atomic mass generally increases as we move down a group and across a period (left - to - right in the periodic table).

Step2: Analyze the first set (N, Li, Be)

N has atomic number 7, Li has atomic number 3, and Be has atomic number 4. In terms of atomic mass, N > Be > Li. So the answer is N.

Step3: Analyze the second set (Br, F, At)

Atomic mass increases down a group. At is below Br and F in Group 17. So the answer is At.

Step4: Analyze the third set (O, Se, Te)

In Group 16, Te is below Se and O. So the answer is Te.

Step5: Analyze the fourth set (Si, Cl, B)

Cl has a higher atomic number and mass compared to Si and B. So the answer is Cl.

Answer:

N
At
Te
Cl