Bài 4.Cho hai nguyên tố A, B đứng kế tiếp nhau trong bảng tuần hoàn và có tổng số đơn vị điện tích hạt nhân là 37. a. A, B thuộc cùng một chu kì hay cùng một nhóm? Xác định ZA ,ZB.

b. Xác định vị trí của A, B trong bảng tuần hoàn. Cho biết A, B là kim loại, phi kim, hay khí hiếm?

b is the correct

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

the pseudoscience are like beliefs, theories, or like practices that are considered scientific