Question

Write the name given to the vertical columna
ucal columns and horizontal rows in the Modern Periodic
ble. How does the metallic charact
walacter of elements vary on moving down a vertical column?
does the sizeof atomic radius varv on
auius vary on moving left to right in a horizontal row?




Answer the following:
(a) What are autotrophs? Give one example of autotrophs.
(b) What are the conditions necessary for autotrophic nutrition?
OR
Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like
humans?
​

Answer 1

Answer:

Explanation:

$The vertical column is generally known as groups and the horizontol column is known as periods

$ the atomic radius generally decreases from moving left to right in a period due to increase in the nuclear charge between nucleus and the valence electron

$the atomic radius unchanged from moving down as the charge increases but the valence electrons remains the same.

Biology

Autotrophs are organism which produce thre own food and doesn not depend on another organisms

For example = plants

$there are three conditions or requirements for autotrophs

-carbondioxide

-water

-sunlight