Advertisements
Advertisements
प्रश्न
K: Potassium:: C: ______.
Advertisements
उत्तर
K: Potassium:: C: Carbon.
APPEARS IN
संबंधित प्रश्न
Define:- Radicals
Write the names of `"Ca"("NO"_3)_2` compounds :
Define: Ions
What does an atom consist of ? Explain.
Name two particles found inside the nucleus. What are they collectively called ?
Define: An Atom:
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 ?
What value has been given to the mass of this reference atom ?
Find the mass of 2 moles of nitrogen atoms.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Draw the electron dot structure of this compound.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
A change in the physical state can be brought about
A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
______ is a substance that is made up of three oxygen atoms chemically combined.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
