Chemistry ยท Science General

Periodic Table and Elements

421 Questions

The periodic table and elements questions test knowledge of chemical properties, atomic structures, and periodic trends. Topics include alkali metals, transition elements, and ionisation potential. These concepts frequently appear in general science sections of competitive examinations.

Alkali metals propertiesTransition elementsLattice energyIonisation potentialAlkaline earth metals

Periodic Table and Elements Questions

Multiple choice chemistry coordination chemistry werner's theory werner's theory of coordination compounds coordination compounds

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy ?

  1. $SrSO _2$
  2. $MgSO _2$
  3. $CaSO _4$

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydration enthalpy decreases down the group for alkaline earth metal sulphates. Magnesium sulphate (MgSO4) has a relatively small cation size, making its hydration enthalpy high enough to overcome its lattice enthalpy, resulting in high solubility.

Multiple choice

Which of the following elements has the highest electronegativity?

  1. Fluorine

  2. Oxygen

  3. Nitrogen

  4. Carbon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fluorine is the most electronegative element, meaning it has the strongest attraction for electrons in a chemical bond.

Multiple choice

Which of the following is a noble gas?

  1. Helium

  2. Neon

  3. Argon

  4. Krypton
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Helium, neon, argon, and krypton are all noble gases, characterized by their lack of reactivity due to their full valence electron shells.

Multiple choice

Which of the following elements has the highest electronegativity?

  1. Fluorine

  2. Chlorine

  3. Bromine

  4. Iodine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Electronegativity is the ability of an atom to attract electrons. Fluorine has the highest electronegativity of all the elements, meaning that it has the strongest attraction for electrons.

Multiple choice

Which of the following is a noble gas?

  1. Helium

  2. Neon

  3. Argon

  4. Krypton
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Noble gases are elements that are very stable and do not react with other elements. Helium, neon, argon, and krypton are all noble gases.

Multiple choice

Which of the following is a nonmetal?

  1. Hydrogen

  2. Oxygen

  3. Nitrogen

  4. Sodium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nonmetals are elements that are not shiny, malleable, or ductile. Hydrogen is a nonmetal because it is not shiny, malleable, or ductile.

Multiple choice

Which of the following is not a noble gas?

  1. Helium

  2. Neon

  3. Argon

  4. Krypton

  5. Xenon
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Xenon is not a noble gas because it can form compounds with other elements.

Multiple choice

Which of the following is a noble gas?

  1. Helium

  2. Neon

  3. Argon

  4. Krypton

  5. Xenon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Helium is a noble gas.

Multiple choice

What is the chemical symbol for sodium?

  1. Na

  2. K

  3. Li

  4. Rb
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The chemical symbol for sodium is Na, which is derived from the Latin word 'natrium'.

Multiple choice

Which element is the most reactive metal?

  1. Francium

  2. Cesium

  3. Rubidium

  4. Potassium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Francium is the most reactive metal and is highly unstable, with a half-life of only 22 minutes.

Multiple choice

Which metal is known for its high reactivity and is commonly used in batteries?

  1. Lithium

  2. Sodium

  3. Potassium

  4. Calcium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lithium is known for its high reactivity and is commonly used in batteries due to its ability to store and release large amounts of energy.

Multiple choice

Which type of bonding is responsible for the strong attraction between metal atoms?

  1. Covalent bonding

  2. Ionic bonding

  3. Metallic bonding

  4. Hydrogen bonding
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Metallic bonding involves the sharing of free electrons among metal atoms, resulting in a strong attraction between them.

Multiple choice

Which of the following elements is the most reactive alkali metal?

  1. Lithium

  2. Sodium

  3. Potassium

  4. Rubidium

  5. Cesium
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Cesium is the most reactive alkali metal due to its low ionization energy and large atomic radius, making it highly susceptible to losing an electron and forming positive ions.

Multiple choice

Which of the following is NOT a characteristic property of alkali metals?

  1. Low melting point

  2. High boiling point

  3. Shiny appearance

  4. Good electrical conductivity

  5. High reactivity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Alkali metals generally have low boiling points due to weak interatomic forces. High boiling point is not a characteristic property of alkali metals.

Multiple choice

Which of the following Group 2 elements has the highest ionization energy?

  1. Beryllium

  2. Magnesium

  3. Calcium

  4. Strontium

  5. Barium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Beryllium has the highest ionization energy among Group 2 elements due to its small atomic radius and high nuclear charge. It requires more energy to remove an electron from a beryllium atom compared to other Group 2 elements.