Which element has atomic number 87?

Name the noble gas which is placed in the third period and eighth group of the Modern Periodic Table.

The Atomic Mass Number of Oxygen is 16, it is a whole number which is equal to the sum of what?

Which atom has an atomic number such that it attains stability by gaining three electrons in its fifth shell?

Which among the following elements behaves like alkali metals as well as halogens in its properties?

In which group of the periodic table can fluorine, chlorine, bromine, and iodine be found?

An element having atomic number 17 will resemble which of the following elements having Atomic number as given below?

Which of the following is the strongest reducing agent?

Non-metals are found in which among the following blocks in the modern periodic table?

Which element has atomic number 87?

Which of the following is the most reactive metal?

Name the noble gas which is placed in the third period and eighth group of the Modern Periodic Table.

Which of the following types is included in the leftmost group of the periodic table?

Which of the following has zero electron affinity in the periodic table?

Which of the following statement is NOT correct regarding the alkali metals?

What is the number of electrons present in Magnesium(Atomic Mass = 24)?

Which of the following is NOT a halogen gas?

Which of the following elements has variable valency?

Identify an anomaly element that belongs to both group 1 and group 17.

Calculate the number of electrons that can be accommodated in the 5th shell.

Which of the following elements is a member of the actinoid series?

Name the element which has an electronic configuration of 2, 8, 7.

Neutrons are present in the nucleus of all atoms, except-

The number of __________ is equal to the difference between the mass number of the atom and the atomic number.

What is the symbol of the chemical element sodium whose atomic number is 11?

Which of the following pairs of 'number–composition' is correct?

I. Atomic number – Number of protons

II. Mass number – Sum of the number of neutrons and protons

The ionisation potential of nitrogen is-

An atom has a mass number of 23 and an atomic number of 11. How many protons does this atom have?

Atoms of elements having same mass number, but different atomic number is known as?

Which of the following elements has the smallest atomic radius?

What is Helium's atomic number?

Which of the following belongs to the same period of Group 1A?

Which of the following pairs of chemical elements and their symbols is INCORRECT?

What is the primary reason for the anomalous behaviour of lithium in comparison to other alkali metals?

Which allotrope of carbon is a good conductor of electricity?

In which group of the Periodic Table will you put the elements with electronic configuration [He]2s²2p⁶?

The correct order of electron affinity of halogens is:

Which of the following statement is NOT correct regarding the alkali metals?

Which among the following Groups do not belong to the p-block of the periodic table?

The least reactive elements of the periodic table are:

Which of the following is a non-metal?

The elements with atomic numbers 10, 18, 36 and 54 are-

What is the total number of shells involved in electronic configuration of carbon?

Sodium is a reactive metal, which if kept open reacts with ________ to explode and catch fire.

Which is the first element on the periodic table?

Which of the following elements is the most reactive?

Find the odd one out.

Which of the following gases is Inert Gas?

The number of neutrons in an atom is equal to the:

Which of the following metal lies in the liquid state at the room temperature?