Classification and Organization of Elements Quiz

Hydrogen is the first element in the periodic table, with atomic number 1.

Oxygen is the most abundant element in the Earth's crust, comprising about 46.6% of its mass.

Group 18 elements are known as noble gases due to their stable and unreactive nature.

The chemical symbol for gold is Au, derived from the Latin word 'aurum.'

Silicon is commonly used in semiconductor devices due to its ability to conduct electricity under certain conditions.

Halogens are known for their reactivity and tendency to form salts, as seen with compounds like sodium chloride (table salt).

Dmitri Mendeleev proposed the modern periodic table, arranging elements by atomic mass and predicting properties of undiscovered elements.

Fluorine has the highest electronegativity among the elements, indicating its strong attraction for electrons.

Neutrons, along with protons, contribute to the atomic mass of an element by being present in the nucleus.

Tungsten has the highest melting point among all elements, making it useful in high-temperature applications.

Hydrogen is the lightest element in the periodic table, with the simplest atomic structure.

Graphite is used as a moderator in nuclear reactors to slow down neutrons, aiding in the fission process.

The atomic number of Uranium is 92, indicating it has 92 protons in its nucleus.

J.J. Thomson is credited with the discovery of the electron through his experiments with cathode rays.

The chemical symbol for lead is Pb, derived from the Latin word 'plumbum.'

The chemical symbol for mercury is Hg, derived from the Latin word 'hydrargyrum.'

The chemical symbol for tungsten is W, derived from its German name 'Wolfram.'