Advertisements
Advertisements
प्रश्न
Which among the following elements would lose an electron easily?
विकल्प
Mg
Na
Al
Cl
Advertisements
उत्तर
Na
Explanation:
An element loses an electron more easily if it has a lower ionisation enthalpy, which is characteristic of alkali metals like sodium. Sodium has only one valence electron in its outermost shell (2, 8, 1) and is located furthest to the left in its period, making it the most metallic and electropositive among the choices provided, thus requiring the least energy to lose an electron.
APPEARS IN
संबंधित प्रश्न
An element has its electron configuration as 2, 8, 2. Now answer the following question.
a. What is the atomic number of this element?
b. What is the group of this element?
c. To which period does this element belong?
d. With which of the following elements would this element resemble? (Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
6C, 3Li, 9F, 7N, 8O Which of the above elements has the highest nonmetallic character?
An element has its electron configuration as 2, 8, 2. Now answer the following question.
What is the group of this element?
An element has its electron configuration as 2, 8, 2. Now answer the following question.
Which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)
Find the odd one out and give its explanation.
Find the odd one out and give its explanation.
Answer the following question in one sentence.
Write the name of the noble gas having 2 electrons in its valence shell.
Answer the following question in one sentence.
Write the name of an element having electronic configuration 2,8,2.
Answer the following question in one sentence.
What determines the chemical reactivity of elements?
Match the columns.
| Column A Electronic configuration |
Column B Valency |
| 1) 2, 2 | a) 1 |
| 2) 2, 8, 1 | b) 2 |
| 3) 2, 5 | c) 3 |
| d) 5 |
Write the name.
The element having stable electron configuration from the third period.
Write the name.
The group of elements having electronic configuration 2, 2.
Beryllium and calcium are alkaline earth metals.
Write a scientific reason.
Boron and oxygen elements are placed in the second period in periodic table.
Distinguish between:
Group - Period
What is the electronic configuration of K19?
