Advertisements
Advertisements
Question
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^40_20Ca}\]
Advertisements
Solution
Geometric atomic structure of:
A = P + n
40 = 20 + n
∴ n = 40 − 20 = 20 neutrons
e = 20
Electronic arrangement 2, 8, 8, 2
K L M N
APPEARS IN
RELATED QUESTIONS
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.
Name an element which does not contain neutron.
How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?
Give reason
`""_17^35"CI"` and `""_17^37"CI"` do not differ in their chemical reactions.
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 ______.
Complete the table give below.
| Element |
Atomic number |
Electron distribution | Valence electrons | Lewis dot structure |
| Lithium | 3 | 1s22s1 | ||
| Boron | 5 | 1s22s22p1 | ||
| Oxygen | 8 | 1s22s22p4 |
Why are Noble gases inert in nature?
Complete the following table:
| Atoms | Atomic number | Electron distribution | |
| 1. | O | 8 | ______ |
| 2. | N | ______ | ______ |
| 3. | ______ | 17 | ______ |
| 4. | ______ | ______ | 2,8,2 |
How many electrons are required or released by each atom in chlorine to attain the nearest noble gas configuration?
