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
State one observation which shows that atom is not indivisible.
State the type of bonding in the following molecules.
Calcium oxide
Identify the following reaction as either oxidation or reduction:
Zn → Zn2+ + 2e-
Copy and complete the following table relating to the atomic structure of some elements:
| Element | Atomic Number | Mass Number | Number of protons | Number of Neutrons | Number of Electrons |
| Beryllium | 4 | 9 | |||
| Fluorine | 9 | 10 | |||
| Sodium | 12 | 11 | |||
| Aluminium | 27 | 13 | |||
| Phosphorus | 31 | 15 |
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^23_11Na}\]
Sodium having atomic number 11, is ready to ______ electron/ electrons to attain the nearest noble gas electronic configuration.
The element that would form anion by gaining electrons in a chemical reaction is ______.
How do atoms attain Noble gas electronic configuration?
______ theory explains the formation of molecules.
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
