Multiple Choice
One isotope of a metallic element has a mass number of 65 and 35 neutrons in the nucleus. The cation that this atom forms has 28 electrons. What is the symbol of the cation?
3234
views
24
rank
1
comments
2. Atoms & Elements
Ions
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following would most likely form an anion with a 2– charge?
A
K
B
Ca
C
Sc
D
Se
E
Br
F
Kr
Verified step by step guidance1
Step 1: Understand the concept of anions. Anions are negatively charged ions formed when an atom gains electrons. The charge of the anion is determined by the number of electrons gained.
Step 2: Identify the group in the periodic table where elements typically form anions with a 2- charge. Elements in Group 16 (the oxygen group) often form anions with a 2- charge because they tend to gain two electrons to achieve a stable electron configuration.
Step 3: Examine the elements provided in the problem: K (Potassium), Ca (Calcium), Sc (Scandium), Se (Selenium), Br (Bromine), and Kr (Krypton). Determine which of these elements belong to Group 16.
Step 4: Recognize that Selenium (Se) is in Group 16 of the periodic table. Elements in this group typically gain two electrons to form anions with a 2- charge.
Step 5: Conclude that Selenium (Se) is the element most likely to form an anion with a 2- charge, based on its position in the periodic table and its tendency to gain electrons.
Related Videos
Related Practice
