Skip to content Home Questions Play Progress Daily Challenge Questions › Chemistry Questions QUESTION Which listed chemical element is a noble gas? Open question → QUESTION Which listed naturally occurring element has a relative atomic mass of approximately 238? Open question → QUESTION Which element in the modern periodic table has the same number of valence electrons as that of caesium? Open question → QUESTION Lanthanides are often called: Open question → QUESTION Identify the element that does NOT belong to Period 6 of Modern Periodic Table. Open question → QUESTION Consider the following statements about transuranic elements: 1. Rutherfordium is a synthetic radioactive element with atomic number 104. 2. Mendelevium was discovered before Rutherfordium… Open question → QUESTION Which of the following elements is NOT a halogen? Open question → QUESTION Which of the following group elements are called chalcogens? Open question → QUESTION Identify the last element from the fifth period. Open question → QUESTION Which Group 13 element has atomic number 113 and the commonly tabulated predicted electronic configuration [Rn]5f¹⁴6d¹⁰7s²7p¹? Open question → QUESTION What is the atomic number of Bohrium which is named after physicist Niels Bohr, one of the founders of quantum theory? Open question → QUESTION Which element has atomic number 87, no known biological role and a longest-lived isotope with a half-life of about 22 minutes? Open question → QUESTION In which numbered group of the periodic table is the element with electronic configuration [He]2s²2p⁶? Open question → QUESTION Which soft, silvery lanthanide metal has atomic number 59? Open question → QUESTION Which German chemist was the first to show a graphical representation of the periodicity of an atomic volume plotted against atomic weight? Open question → QUESTION Which of the following options are all transition metals? Open question → QUESTION Consider the following statements about Group 0 elements in the modern periodic table: 1. Group 0 elements are commonly referred to as inert gases… Open question → QUESTION The behaviour of lithium is similar to that of magnesium. This sort of similarity is commonly referred to as: Open question → QUESTION Among the following chemical elements, which one belongs to the group of alkali metals in the periodic table? Open question → QUESTION Which element posed a problem of definite placement in Mendeleev’s periodic classification because it resembled both alkali metals and halogens? Open question → QUESTION On what main basis did Dmitri Mendeleev organise elements in his periodic table? Open question → QUESTION What is the energy released when an electron is added to a neutral gaseous atom to form a negative ion called? Open question → QUESTION Which synthetic element, identified by atomic number, is named seaborgium in honour of Glenn T. Seaborg? Open question → QUESTION Technetium, the first artificially produced element used in many medical diagnostic imaging scans, is found in which group of the periodic table? Open question → Home Questions Play Progress 