Arrangement of elements：練習題

What is the basis for the arrangement of elements across a Period in the modern Periodic Table?

An element is located in Group II of the Periodic Table. Based on its group number, what is the charge of the ion it forms?

Element X is in Period 3 and Group I. Element Y is in Period 3 and Group VII. Which statement comparing their properties is correct?

In the Modern Periodic Table, elements are arranged in order of which property?

Which statement correctly describes the change in character of elements across Period 3 from Group I to Group VII?

State how elements are arranged in the Periodic Table in terms of their atomic structure.

Explain the relationship between an element's period number and its electronic configuration.

Describe the change in character of elements as you move from left to right across a period, such as Period 3.

An element has the atomic number 12.

(a) Determine the electronic configuration of this element.
(b) Use the electronic configuration to identify the Group and Period this element belongs to.
(c) Predict the charge of the ion formed by this element and state whether it is a cation or an anion.

The table below provides information on four elements: A, B, C, and D.

- Element A: Proton number 11
- Element B: Proton number 17
- Element C: Proton number 18
- Element D: Proton number 19

(a) Which two elements are in the same Group? Justify your answer.
(b) Which two elements are in the same Period? Justify your answer.
(c) Predict the formula of the compound formed between A and B and identify the type of bonding present.
(d) Explain why element C does not form any compounds with the other elements.