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Questions
Define the term of atomic number.
What is meant by the term atomic number
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Solution
Atomic number [Z]: “Is the number of protons in the nucleus of an atom.”
OR “Is the number of positive charges in the nucleus of its atom.”
OR “Is the number of electrons in the complete atom.”
Z = P = e
RELATED QUESTIONS
Explain the Atomic number with example.
Which of the following are isoelectronic species i.e., those having the same number of electrons?
Na+, K+, Mg2+, Ca2+, S2–, Ar
Fill in the blanks.
Isotopes are the atoms of ______ element having the ______ atomic number but ______ mass number.
What is variable valency? Name two elements having variable valency and state their valencies.
FILL IN THE BLANK
Atomic theory of matter was given by ..........................
Tick the most appropriate answer.
Which of these have similar chemical properties but different set of physical properties and mass number?
- isobars
- elements
- isotopes
- none of these
The atomic number of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is :
What is meant by the 'atomic number of an element'?
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Do isotopes have the same atomic number or the same mass number?
Name the 3 sub-atomic particles of an atom.
