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प्रश्न
Fill in the blank
An excess of electrons produces a ________ charge.
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उत्तर
An excess of electrons produces a negative charge.
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संबंधित प्रश्न
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
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 `("NH"_4)_2"SO"_4` compounds:
Fill in the blank
An ion with positive charge is called ______
What does an atom consist of ? Explain.
Name two particles found inside the nucleus. What are they collectively called ?
Define: Covalent bond
Define: An Atom:
Fill in the blank
A charged particle is called an _____
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
State two observations which show that atom is not indivisible.
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Which of the following statement is correct about the atom of an element ?
Find the mass of 2 moles of nitrogen atoms.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
1 mole of Gold and Silver contain same number of atoms.
Lead is also known as plumbum.
The first scientific theory about atoms was given by J J. Thomson.
