Chemistry General Knowledge Questions and Answers: Chemistry GK

The spin of two electrons located in the same orbital is found to be opposite, hence the spin between them is known by the quantum number.

Nuclei are classified based on the number of protons (atomic number) or the total number of nucleons (mass number):

Isotopes: Atoms of an element which have the same atomic number but different mass numbers are called isotopes. All isotopes have similar chemical properties.

Isobar: Nuclei which have the same mass number (A) but a different atomic number (Z) are called isobar.

Even-neutronic: Nuclei having equal number of neutrons are called even-neutronic. For them both atomic number (Z) and mass number (A) are different, but the value of (A – Z) is the same.

Ethylene (IUPAC name: ethene) is a hydrocarbon whose molecular formula is C2H4 or H2C=CH2. It is a colorless, flammable gas with a mild sweet musky odor. Ethylene is used extensively in chemical industries.

The outermost orbital shell of an atom is called its valence shell, and the electrons present in the valence shell are called valence electrons. The valence electrons of an atom are electrons with higher energy and hence they are more reactive.

If an atom has more electrons than protons, it is a negative ion or anion. If it has more protons than electrons, it is a positive ion.

Electrons revolve around the nucleus in orbital motion. This motion involves the quantum mechanical motion of particles (electrons in this perspective). Orbital motion involves translation of the center of mass rather than rotation (rotation of the axis).

The atomic number of sodium (11) is higher than that of fluorine (9). ,

Atom: The smallest particle of any element which has all the chemical and physical properties of that element,

Is called atom. An atom consists of three subatomic particles: the electron, the proton, and the neutron. Protons and neutrons reside in the nucleus and electrons move around the nucleus on a particular path.

The electron has a negative charge on itself and the proton has a positive charge.

The neutron is neutral.

An atom has three parts: protons, electrons, and neutrons. The nucleus contains protons and neutrons and electrons revolve around the nucleus. The proton has a positive charge, the electron has a negative charge and the neutron has no charge.

When the difference in electronegativity between two atoms is very high then an ionic bond is formed.