3. Q1 Which of these is not a noble gas?
A) Helium
B) Chlorine
C) Krypton
D) Argon
4. Q2. The modern periodic table was
invented by
A) Mendel
B) Nobel
C) Mendeleev
D) Lavoisier
5. Q3. The element symbol Ag is the
symbol of
A) Gallium
B) Magnesium
C) Gold
D) Silver
6. Q4. NaCl is the chemical formula of
A) Table Salt
B) Rock salt
C) Sodium chlorine
D) Fruit salt
7. Q5. Bronze is an alloy of
A) Copper & tin
B) Copper & Zinc
C) Copper & lead
D) Copper & mercury
8. Q6. On the periodic table, elements
that are in the same vertical
column are considered to be in the
same what?
A) Period
B) Row
C) Category
D) Group
9. Q7. Isotopes of an element have
A) Same physical properties
B) Different chemical properties
C) Different number of neutrons
D) Different atomic numbers