An atom of an element X may be written as 19
9 X. [3]
(a) What does the 19 figure indicate?
(b) What does the 9 figure indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) How many electrons are there in the outermost shell of an atom of element X?
(f) Write the symbol of ion formed by an atom of element X.
Answers
Answer:
An atom of an element X may be written as 19
9 X. [3]
(a) What does the 19 figure indicate?
(b) What does the 9 figure indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) How many electrons are there in the outermost shell of an atom of element X?
(f) Write the symbol of ion formed by an atom of element X.
Explanation:
An atom of an element X may be written as 19
9 X. [3]
(a) What does the 19 figure indicate?
(b) What does the 9 figure indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) How many electrons are there in the outermost shell of an atom of element X?
(f) Write the symbol of ion formed by an atom of element X.
Answer:
19 figure indicates the no. of atom of the element X
outermost orbit 7 electrons
1-