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प्रश्न
Fill in the blank
An ion with negative charge is called _______
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उत्तर
An ion with negative charge is called anion.
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संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
Give the charge and the mass of an electron, proton and neutron present in an atom ?
What are orbits or shells ?
Define: Covalent bond
What does the word ‘atom’ mean?
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
The electron shell ______ is nearest to the nucleus.
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.
Name the gas that.
Turns moist starch iodide paper blue black.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
K: Potassium:: C: ______.
Define – Atom.
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.
Give the salient features of “Modern atomic theory”.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
