The image shows the nucleus of an atom. Write the period number (X) and group number (Y) in the table for the chemical element shown, according to the Periodic Table of D. I. Mendeleev. (Use Arabic numerals for the answer.) Answer:

The image displays a model of an atom's nucleus. The nucleus contains orange spheres with plus signs (protons) and blue spheres (neutrons).

By counting, we find there are 8 protons and 8 neutrons.

The number of protons determines the atomic number of an element. Therefore, the atomic number of this element is 8.

Looking at the Periodic Table, the element with atomic number 8 is Oxygen (O).

Oxygen is located in Period 2 and Group 16.

So, X = 2 and Y = 16.

Ответ: 2, 16