Advertisements
Advertisements
प्रश्न
Define:- Radicals
Advertisements
उत्तर
Radicals : A radical is an atom of an element or a group of atoms of different elements that behaves as a single unit with a positive or negative charge on it.
APPEARS IN
संबंधित प्रश्न
Write the names of `"Na"_3"PO"_4` compounds :
Name two particles found inside the nucleus. What are they collectively called ?
What are orbits or shells ?
Define: Covalent bond
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
The smallest particle of matter that can exist by itself is ______.
The basic unit of matter is ______.
K: Potassium:: C: ______.
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
Which of the following statements made by Dalton has not undergone any change?
An element is composed of ______ atoms.
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Write any two observations which support the fact that atoms are divisible.
