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Question
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
Solution
Elements contains two or more kinds of atoms and compounds contains two or more kinds of elements.
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RELATED QUESTIONS
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define:- Molecule
Write the names of the elements present in the following compound.
Common salt
Write the names of the elements present in the:-
Ammonia
Write the names of the elements present in the:-
Acetic acid
Fill in the blank:
Atoms are _____
Define: Covalent bond
What does the word ‘atom’ mean?
How did Neils Bohr visualise the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X ?
Write the full form of IUPAC.
Write the relation between nanometre and metre.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
One nm is equal to :
Find the mass of 2 moles of nitrogen atoms.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Draw the electron dot structure of this compound.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
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.
An atom is electrically neutral.
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.
Define the following term with an example.
Compound
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Does the solubility of a substance change with temperature? Explain with the help of an example.
The most abundant type of atom is the universe is ______.
