Taking into consideration the period of the elements given below,…

Question

Taking into consideration the period of the elements given below, answer the following questions:

Element	Atomic radius (pm)
O	66
B	88
C	77
N	74
Be	111
Li	152

i. Arrange the above elements in a decreasing order of their atomic radii.
ii. State the period to which the above elements belong.
iii. Why this arrangement of elements is similar to the above period of the modern periodic table?
iv. Which of the above elements have the biggest and the smallest atom?
v. What is the periodic trend observed in the variation of atomic radius while going from left to right within a period?

✓

Answer

i. Li > Be > B > C > N > O
ii. All the given elements belong to the second period of the modern periodic table.
iii. The arrangement of the elements matches with the second period of the modern periodic table because the elements were arranged in the decreasing order of their atomic radius.
iv. Lithium (Li) has the biggest atom and oxygen(O) has the smallest atom.
v. Atomic radius decreases while going from left to right within a period.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions: [5 M]" from P-1 Periodic Classification of Element→P-1 Periodic Classification of Element — all question types→Science STD 10 question papers→Maharashtra Board STD 10 question papers→Maharashtra Board question paper generator→

Similar questions

Which are the effects of dry famine?

→

A 5V battery is connected to two $20 Ω$ resistors which are joined together in series.

Draw a circuit diagram to represent this. Add an arrow to indicate the direction of conventional current flow in the circuit.
What is the effective resistance of the two resistors?
Calculate the current that flows from the battery.
What is the p.d. across each resistor?

→

What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.

→

When a moist slice of bread was kept aside for a few days then some organism grew on it to form a white cottony mass which later turned black. When this slice of bread was observed through a magnifying glass, then fine thread-like projections and thin stems having bulb-like structures at the top were seen.

What is the common name and scientific name of the organism which grew on the moist slice of bread?
How did this organism grow on the moist slice of bread automatically?
What are the fine, thread-like projections on the surface of slice of bread known as?
What name is given to the knob-like structures and what do they contain?
What is the name of this method of reproduction?
Name one unicellular organism which reproduces by this method.
Name tow non-flowering plants which reproduce by this method.

→

Write one or two words for each of the following statements/ definitions:

Each level of food chain where transfer of energy takes place.
The physical factors like temperature, rainfall, light, soil, air and water of an ecosystem.
Organisms which depend on the producers for food either directly or indirectly.
The physical and biological world where we live in.
Selfcontained unit of living things and their non-living environment needing only sunlight for its functioning.

→

A non - metal $X$ which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas $Y.$ When gas $Y$ is treated with sulphuric acid, it forms a compound $Z$ which is used as a chemical fertiliser.