Elements in the same vertical group of the periodic table have the same number of valence electrons.
Correct answer: A. Number of valence electrons**
- A. Number of valence electrons**
- B. Atomic number:
- C. Atomic mass
- D. Atomic volume
Explanation
- **Correct Option: (a) Number of valence electrons** Explanation: Elements in the same group of the periodic table have similar chemical properties because they possess the same number of valence electrons. Valence electrons determine how an element will interact with other elements to form compounds.- **Incorrect Options Explained:** (b) Atomic number: Elements in the same group have different atomic numbers; this property varies across periods. (c) Atomic mass: Atomic mass generally increases as you move down a group due to additional energy levels and more massive atoms; it's not constant within a group. (d) Atomic volume: This value changes for elements in the same group due to the increase in the number of electron shells as you move down the group.
Last updated
About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2. Law of octaves was proposed by
7th period of the periodic table contains normal elements:
(A), (B) and (C) are elements in the third period. The oxide of(A) is ionic, that of (B) is amphoteric and that of (C) is a giant molecule (covalent network). (A), (B) and (C) have atomic numbers in the order:
(A), (B) and (C) are elements in the third short period. Oxide of (A) is ionic, that of (B) is amphoteric and of (C) a giant molecule. (A), (B) and (C) have atomic numbers in the order of:
A gas that reacts with CaO and not with NaHCO3 is: