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Question
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
Options
True
False
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Solution
False
Correct statement: The basic unit of an element is atom.
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RELATED QUESTIONS
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Write the names of the elements present in the:-
Glucose
Write the names of `("NH"_4)_2"SO"_4` compounds:
Write the names of `"FeS"` compounds :
Write the names of `"Na"_3"PO"_4` compounds :
Name the particles which revolve around the nucleus.
Give two examples for each of ionic and covalent bond.
Fill in the blank
If an atom gains an electron, it is called an _______
Define the following term:
Atom
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
The smallest particle of matter that can exist by itself is ______.
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.
Which of the following statements made by Dalton has not undergone any change?
In all atoms of an element
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
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?
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
