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Q.1: What is Dalton's atomic theory?

Q.2: What is a compound?

Q.3: What is the formula of a compound?

Q.4: What are the rules for writing a formula?

Q.5: What is the nuclear force?

Q.6: What is the anti-particle?

Q.7: The nucleus of an atom contains --------- which are positively charged.

Q.8: The nucleus of an atom may contain -------- which are uncharged.

Q.9: Although the nucleus of an atom is very important, it is the --------- of the atom that determine its chemical nature.

Q.10: The -------- number represents the sum of the number of protons and neitrons in the nucleus.

Q.11: An isolated atom has a net charge of ---------.

Q.12: An ion with two more protons than electrons has a charge of -------.

Q.13: The tendency to gain electrons is a fundamental property of --------- elements.

Q.14: An anion containing an element and one or more -------- atoms is called an oxyanion.

Q.15: Many acids contain the element -------- in addition to hydrogen.

Q.16: Which particle has the smallest mass ?
(A) proton
(B) neutron
(C) alpha particle
(D) electron
Select the labelled statement that best fits your answer.

Q.17: An atom containing 9 protons, 10 neutrons and 9 electrons has a mass number of
(A) 28
(B) 19
(C) 18
(D) 9
(E) 10
Select the labelled statement that best fits your answer.

Q.18: Tritium is an isotope of
(A) plutonium
(B) nitrogen
(C) hydrogen
(D) helium
(E) titanium
Select the labelled statement that best fits your answer.

Q.19: Which oxyanion of chlorine contains the most oxygen atoms?
(A) hypochlorite
(B) chlorite
(C) chlorate
(D) perchlorate
Select the labelled statement that best fits your answer.











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