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प्रश्न
Write the names of `"FeS"` compounds :
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उत्तर
`"FeS"` - Iron sulphide
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संबंधित प्रश्न
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Define: Chemical bond
Fill in the blank
A charged particle is called an _____
Find the mass of 2 moles of nitrogen atoms.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
K: Potassium:: C: ______.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
1 mole of Gold and Silver contain same number of atoms.
Which of the following has maximum number of atoms?
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
Write any two observations which support the fact that atoms are divisible.
The most abundant type of atom is the universe is ______.
The ______ are combination of atoms of various elements or the same element.
The first scientific theory about atoms was given by J J. Thomson.
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
