Advertisements
Advertisements
प्रश्न
Five atoms are labeled A to E
|
Atoms |
Mass No |
Atomic No. |
|
A |
40 |
20 |
|
B |
19 |
9 |
|
C |
7 |
3 |
|
D |
16 |
8 |
|
E |
14 |
7 |
(a) Which one of these atoms:
(i) contains 7 protons
(ii) has electronic configuration 2,7
(b) Write down the formula in the compound formed between C and D
(c) Predict : (i) metals (ii) non-metals
Advertisements
उत्तर
(a)
Atom E contains 7 protons.
Atom B has an electronic configuration 2, 7.
(b) Atom C stands for7Li3, Atom D stands for 8O16.
Hence, compound formula is Li2O.
(c) Metals: A and C, Non-metals: B, D, E
APPEARS IN
संबंधित प्रश्न
What type of bond is formed between two atoms, when the electronegative difference between them is zero?
Fill in the blanks.
The electrovalent bond or ionic bond is called as _____ bond
Element X is a metal with a valency 2. Element Y is a non metal with a valency 3.
(a) Write equations to show how X and Y form ions.
(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.
Match the column A with Column B.
|
Column A |
Column B |
|
(i) Sodium chloride (ii) Ammonium ion (iii) Carbon tetrachloride |
Covalent bond Ionic bond Covalent and coordinate bond |
How many atoms of each kind are present in the following molecule:
Calcium oxide
Complete the following table relating to the atomic structure of some elements.
|
Element Symbol |
Atomic Number |
Mass Number |
Numbers of neutrons |
Number of Electrons |
Number of Protons |
|
Li |
3 |
6 |
|
|
|
|
Cl |
17 |
|
20 |
|
|
|
Na |
|
|
12 |
|
11 |
|
Al |
|
27 |
|
|
13 |
|
S |
|
32 |
16 |
|
|
Compare :
Sodium atom and sodium ion
Give the orbital diagram of the following:
Magnesium chloride
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^12_6C}\]
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is chemically inert.
