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प्रश्न
Fill in the blank
An _______ is electrically neutral.
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उत्तर
An atom is electrically neutral
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संबंधित प्रश्न
WRITE SHORT ANSWER
Define an ionic compound.
Write the names of the elements present in the following compound.
Common salt
Write the names of `"FeS"` compounds :
Fill in the blank:
Atoms are _____
Fill in the blank
An ion with positive charge is called ______
Define: Relative atomic mass
What are orbits or shells ?
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Define: An Atom:
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
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 element will lose electron?
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Name the sub-atomic particles.
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.
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Atoms of one element can be transmuted into atoms of other elements by ______
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?
Write any two observations which support the fact that atoms are divisible.
