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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