Question

Q.4 Define :
a) Variable Valency
b) Neutrons
c) Triatomic molecules
d) Nucleons
e) Fractionating column

Answer 1

Answer:

A- the combination power of elements specially as meassured by the nomber of hydrogen it can dissaper by combine with.

B- neutron is subatomic particle symbol n

C- triatomic atoms are molucles composed with joining with three atoms H2o, CO2

D- in chemestry nucleous either neutron or proton.

E-

Explanation:

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Answer 2

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a) Certain elements combine with other atoms, donating, accepting or sharing electrons in different proportions depending on the nature of the reaction. For example, iron combines with oxygen to form ferrous oxide as well as ferric oxide. This is termed variable valency.

b) The neutron is a subatomic particle, symbol n or n⁰ , which has a neutral charge and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms.

c) Triatomic molecules are molecules composed of three atoms, of either the same or different chemical elements. Examples include H₂O, CO₂ and HCN.

d) In chemistry and physics, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus. The number of nucleons in a nucleus defines an isotope's mass number (nucleon number). Until the 1960s, nucleons were thought to be elementary particles, not made up of smaller parts.

e) A fractionating column or fractional column is an essential item used in the distillation of liquid mixtures to separate the mixture into its component parts, or fractions, based on the differences in volatilities.