periodic classification of elements Flashcards
1
Q
Q1- Vertical columns are called as - A) groups B) periods C) rows D) none
A
A
2
Q
Q2- How many groups are there in the periodic table? A) 18 B) 8 C) 28 D) 17
A
A
3
Q
Q3- Which group was added in Mendleev's periodic table? A) I group B) VIII group C) zero group D) V group
A
C
4
Q
Q4- What is the special name given to the 17th group? A) chalcogens B) halogens C) alkali metals D) inert gases
A
B
5
Q
Q5- Chalcogens are ? A) ore forming B) salt forming C) hydroxide forming D) None
A
A
6
Q
Q6- Atomic mass is equal to the sum of \_\_\_\_. A) P+N B) P+E C) Number of Protons D) Number of neutrons
A
A
7
Q
Q7- Name the most electronegative element of Periodic table ? A) Chlorine B) Bromine C) Fluorine D) Iodine
A
C
8
Q
Q8- Electron affinity is \_\_\_\_. A) always negative B) always positive C) can be negative or positive D) zero
A
C
9
Q
Q9- Ionisation energy is measured in - A) KJ/g B) J/mole C) KJ/mol D) none
A
C
10
Q
Q10- Out of Mg and Al which has higher ionisation energy? A) Mg B) Al C) Both have same D) None
A
B
11
Q
Q11- Write valency of Iron ? A) 2 B) 3 C) 0 D) 2,3
A
D
12
Q
Q12- Out of F and Cl, which has higher electron affinity ? A) Cl B) F C) Both have same D) none
A
A
13
Q
Q13- Upto which element, the law of octaves was found to be applicable - A) Oxygen B) Calcium C) Cobalt D) Potassium
A
B
14
Q
Q14- According to Mendeleev's Periodic law, the elements were arranged in Periodic table according to - A) Increasing atomic number B) decreasing atomic number C) Increasing atomic masses D) decreasing atomic masses
A
C
15
Q
Q15- In Mendeleev’s Periodic table, gaps were left for many elements. Pick any one out of them.
A) Germanium
B) Chlorine
C) Oxygen
D) Silicon
A
A
16
Q
Q16- What relation do Ar and Ca have? A) isotopes B) isoelectronic C) isobars D) isotones
A
C
17
Q
Q17- Isotopes possess - A) same number of Protons B) same number of neutrons C) same mass number D) none
A
A
18
Q
Q18- On which factor does ionisation energy depend? A) Size of an atom B) nuclear charge C) electronic configuration D) all
A
D
19
Q
Q19- Pick out the odd one - A) Argon B) neon C) Barium D) helium
A
C
20
Q
Q20- Which is biggest in size - A) Lithium B) sodium C) Magnesium D) potassium
A
D
