The mass number of potassium is:

[SSC CGL 2022]

Which of the following is a highly electropositive element that readily gives up an electron in order to obtain a stable electronic configuration ?

[SSC CGL 2023]

Identify the element one that does NOT belong to Group 1 of the Modern Periodic Table.

[SSC CGL 2023]

Identify a substance that is NOT an allotrope of carbon.

[SSC CPO 2024]

What is the atomic mass of sodium?

[SSC CHSL 2022]

Which of the following elements is a liquid at room temperature?

[RRB NTPC CBT]

The isotope deuterium of hydrogen has_______ ?

[RRB NTPC CBT]

Identify an element that has atomic number 7.

[RRB NTPC CBT]

Identify the element that is NOT a metalloid.

[SSC GD 2022]

What is the number of electrons found in the outermost shell of the halogens?

[SSC GD 2022]

How many protons are there in a lithium nucleus?

[SSC CGL 2021]

Which of the following element has atomic number 12 ?

[SSC GD 2022]

Which of the following gases is a noble gas?

[RRB NTPC CBT]

Which of the following elements is a metalloid ?

[SSC CGL 2024]

The atomic number of lead is:

[SSC CGL 2022]

Isotopes are atoms that have the ___________.

[RRB NTPC CBT]

Select the correct order of the following metals in terms of their increasing reactivities.

[SSC MTS 2024]

The behaviour of lithium is similar to that of magnesium. This sort of similarity is commonly referred to as:

[RRB NTPC CBT]

Ferrum is the Latin name for ______ .

[SSC CGL 2021]

Which of the following pairs of 'elements - valency' is correct?
1. Boron - 2
II. Fluorine - 3

[SSC CHSL 2022]

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

[SSC GD 2022]

All noble gas molecules are-

[RRB NTPC CBT]

What chemical element does "H" stand for in the periodic table of science?

[SSC MTS 2022]

Identify an element that is NOT a semimetal.

[SSC GD 2022]

The term ‘Isotope’ refers to:-

[RRB NTPC CBT]

What do you call the distance between the centre of the nucleus and the outermost shell of an isolated atom ?

[SSC GD 2022]

How many maximum electrons can M shell have?

[SSC CGL 2022]

Which of the following elements is a versatile element that forms the basis for all living organisms and many of the things we use?

[RRB NTPC CBT]

Which element of Group 17 has two isotopes of masses 35 and 37 amu with average abundance of 75.77% and 24.23%, respectively?

[SSC CGL 2023]

Which chemical element of Group 18 of the periodic table is produced by the natural radioactive decay of uranium in soils and rocks ?

[SSC CPO 2023]

The elements in Group 17 of the periodic table are known as:

[SSC MTS 2024]

Which soft metal in group 1 of the periodic table tarnishes within a few seconds of exposure to air ?

[SSC MTS 2023]

A diagonal relationship is found between which pair of the following elements ?

[SSC CHSL 2023]

11 What is the atomic number of Nitrogen in the science periodic table?

[SSC MTS 2022]

The first electron shell which is the nearest to the nucleus never holds more than 'n' electrons, where 'n' is equal to:

[SSC CGL 2019]

The most common isotopes used in a nuclear weapon are of:

[RRB NTPC CBT]

Out of the following metals, choose the odd one out on the basis of their place in the periodic table.

[RRB NTPC CBT]

What is the atomic number of Helium according to the modern periodic table?

[SSC GD 2024]

Which is the only non-metal present in liquid state at room temperature?

[RRB NTPC CBT]

Identify the last element from the fifth period.

[SSC CGL 2023]

Which of the following is NOT a halogen gas?

[SSC CGL 2024]

What chemical element does "Mn" stand for in the science periodic table?

[SSC MTS 2022]

Which of the following is the least reactive element?

[RRB NTPC CBT]

Which of the following is NOT an alkaline earth metal?

[RRB NTPC CBT]

Which among the following is not an alkali metal and does not belong to the Group 1 of Periodic Table?

[SSC MTS 2022]

What is the atomicity of Phosphorus?

[RRB NTPC CBT]

Which of the following element is more reactive than copper?

[SSC CGL 2022]

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

[SSC CPO 2023]

The correct sequence of metallic character of the given elements is:

[RRB NTPC CBT]

'Au' is the symbol for which of the following elements ?

[SSC CGL 2024]