Question

Define the following
i. Isotopes
ii Speacific Gravity
iii Colloid
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Answer 1

ᴀɴsᴡᴇʀ →

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$\bold{★ \underline { \underline{Isotopes}}}→$

☞︎︎︎ Isotopes are defined as atoms of same element having the same atomic number, but different mass numbers. These atoms contain an equal number of protons and electrons, but a different number of neutrons.

For example, in nature, hydrogen is found in three forms with different mass numbers, namely protium (1/1.H), deuterium(2/1.H), and tritium (3/1.H ). These are the three naturally occurring isotopes of hydrogen. The atomic number of each isotope is 1, but the mass number varies i.e. it is 1, 2, and 3 respectively. Some other examples of isotopes include C- 12 and C-14, which are isotopes of carbon, and Cl-35 and Cl-37, which are isotopes of chlorine.

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$\bold{ ★\underline { \underline{Specific \: gravity}}}→$

☞︎︎︎Specific gravity is a measure of the density of a material. It is equal to the density of the material divided by the density of water.

or,

☞︎︎︎Specific gravity is defined as the ratio of the density of a given solid or liquid substance to the density of water at a specific temperature and pressure, typically at 4°C (39°F) and 1 atm (29.92 in Hg) , making it a dimensionless quantity (see below).Substances with a specific gravity greater than one are denser than water, and so (ignoring surface tension effects) will sink in it, and those with a specific gravity of less than one are less dense than water, and so will float in it. Specific gravity is a special case of, or in some usages synonymous with, relative density, with the latter term often preferred in modern scientific writing. The use of specific gravity is discouraged in technical use in scientific fields requiring high precision — actual density (in dimensions of mass per unit volume) is preferred.

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$\bold{ ★\underline { \underline{Colloid}}}→$

☞︎︎︎ A colloid is a heterogeneous system in which one substance is dispersed (dispersed phase) as very fine particles in another substance called dispersion medium. It is the intermediate system between a solution and a suspension. The size of colloidal particles is between 1 nm and 1000 nm. Example milk, ink etc

Answer 2

Answer:

$\huge\fbox \blue{isotopes}$

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopesof a given element have the same number of protons but different numbers of neutrons in each atom.

$\huge\fbox \red{specific Gravity}$

Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest; for gases, the reference is air at room temperature. 

$\huge\fbox \blue{colloid}$

a homogeneous non-crystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

Explanation:

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