- Which scientist proposed the periodic law based on atomic mass?
A) Moseley
B) Mendeleev
C) Dalton
D) Bohr
Answer: B) Mendeleev - Which element has atomic number 1?
A) Helium
B) Hydrogen
C) Oxygen
D) Nitrogen
Answer: B) Hydrogen - The horizontal rows in the periodic table are called:
A) Groups
B) Blocks
C) Periods
D) Families
Answer: C) Periods - Vertical columns are called:
A) Rows
B) Periods
C) Groups
D) Layers
Answer: C) Groups - Elements in the same period have same:
A) Number of shells
B) Atomic number
C) Mass
D) Valency
Answer: A) Number of shells - Which element is in Group 1 and Period 2?
A) Sodium
B) Lithium
C) Potassium
D) Hydrogen
Answer: B) Lithium - Which element is in Period 3?
A) Carbon
B) Oxygen
C) Sodium
D) Fluorine
Answer: C) Sodium - Which element is a transition metal?
A) Sodium
B) Calcium
C) Iron
D) Oxygen
Answer: C) Iron - Which of the following is a p-block element?
A) Sodium
B) Calcium
C) Aluminium
D) Iron
Answer: C) Aluminium - Which element is in Group 18?
A) Oxygen
B) Nitrogen
C) Argon
D) Fluorine
Answer: C) Argon - The most electropositive element is:
A) Fluorine
B) Oxygen
C) Cesium
D) Neon
Answer: C) Cesium - Which element shows maximum electronegativity?
A) Chlorine
B) Fluorine
C) Oxygen
D) Nitrogen
Answer: B) Fluorine - Which element is smallest in size?
A) Hydrogen
B) Helium
C) Lithium
D) Fluorine
Answer: B) Helium - Atomic radius increases down a group due to:
A) Decrease in shells
B) Increase in shells
C) Increase in protons
D) Decrease in electrons
Answer: B) Increase in shells - Which element is most reactive metal?
A) Sodium
B) Lithium
C) Potassium
D) Cesium
Answer: D) Cesium - Which element is least reactive?
A) Fluorine
B) Chlorine
C) Neon
D) Oxygen
Answer: C) Neon - Which group contains soft metals?
A) Group 1
B) Group 2
C) Group 17
D) Group 18
Answer: A) Group 1 - Which group contains elements with 2 valence electrons?
A) Group 1
B) Group 2
C) Group 3
D) Group 18
Answer: B) Group 2 - Which group contains elements with 7 valence electrons?
A) Group 1
B) Group 2
C) Group 17
D) Group 18
Answer: C) Group 17 - Which group contains stable elements?
A) Group 1
B) Group 17
C) Group 18
D) Group 2
Answer: C) Group 18 - Which element has highest ionization energy?
A) Sodium
B) Magnesium
C) Helium
D) Potassium
Answer: C) Helium - Which element has lowest ionization energy?
A) Hydrogen
B) Sodium
C) Chlorine
D) Oxygen
Answer: B) Sodium - Which of the following is a non-metal?
A) Sodium
B) Iron
C) Oxygen
D) Calcium
Answer: C) Oxygen - Which of the following is a metal?
A) Chlorine
B) Nitrogen
C) Calcium
D) Oxygen
Answer: C) Calcium - Which element is a metalloid?
A) Sodium
B) Boron
C) Oxygen
D) Neon
Answer: B) Boron - Which element is liquid at room temperature?
A) Sodium
B) Mercury
C) Oxygen
D) Chlorine
Answer: B) Mercury - Which element is gas at room temperature?
A) Iron
B) Calcium
C) Oxygen
D) Copper
Answer: C) Oxygen - Which element is solid at room temperature?
A) Oxygen
B) Nitrogen
C) Iron
D) Chlorine
Answer: C) Iron - Which group elements are highly reactive metals?
A) Group 1
B) Group 2
C) Group 17
D) Group 18
Answer: A) Group 1 - Which group elements are highly reactive non-metals?
A) Group 1
B) Group 2
C) Group 17
D) Group 18
Answer: C) Group 17 - The zig-zag line separates:
A) Metals and non-metals
B) Gases and solids
C) Liquids and solids
D) Groups and periods
Answer: A) Metals and non-metals - Which element lies on zig-zag line?
A) Sodium
B) Silicon
C) Oxygen
D) Neon
Answer: B) Silicon - Which element has atomic number 17?
A) Oxygen
B) Nitrogen
C) Chlorine
D) Fluorine
Answer: C) Chlorine - Which element has atomic number 20?
A) Calcium
B) Sodium
C) Magnesium
D) Potassium
Answer: A) Calcium - Which element is in Group 17 and Period 3?
A) Fluorine
B) Chlorine
C) Bromine
D) Iodine
Answer: B) Chlorine - Which element is in Group 2 and Period 4?
A) Magnesium
B) Calcium
C) Beryllium
D) Strontium
Answer: B) Calcium - Which element belongs to f-block?
A) Iron
B) Uranium
C) Oxygen
D) Sodium
Answer: B) Uranium - Which element is radioactive?
A) Oxygen
B) Uranium
C) Nitrogen
D) Neon
Answer: B) Uranium - Which block contains lanthanides?
A) s-block
B) p-block
C) d-block
D) f-block
Answer: D) f-block - Which element is used in fluorescent lamps?
A) Neon
B) Argon
C) Mercury
D) Sodium
Answer: C) Mercury - Which element has symbol Na?
A) Nitrogen
B) Sodium
C) Neon
D) Nickel
Answer: B) Sodium - Which element has symbol K?
A) Krypton
B) Potassium
C) Calcium
D) Copper
Answer: B) Potassium - Which element has symbol Fe?
A) Fluorine
B) Iron
C) Francium
D) Flerovium
Answer: B) Iron - Which element has symbol Cl?
A) Calcium
B) Chlorine
C) Carbon
D) Copper
Answer: B) Chlorine - Which element is a noble gas?
A) Hydrogen
B) Oxygen
C) Argon
D) Nitrogen
Answer: C) Argon - Which element is an alkali metal?
A) Calcium
B) Sodium
C) Aluminium
D) Iron
Answer: B) Sodium - Which element is an alkaline earth metal?
A) Sodium
B) Calcium
C) Potassium
D) Chlorine
Answer: B) Calcium - Which element is a halogen?
A) Sodium
B) Oxygen
C) Bromine
D) Calcium
Answer: C) Bromine - Which property increases across a period?
A) Atomic size
B) Electronegativity
C) Metallic character
D) Shielding
Answer: B) Electronegativity - Which property decreases across a period?
A) Electronegativity
B) Ionization energy
C) Atomic size
D) Nuclear charge
Answer: C) Atomic size
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