Explanation

HCL is commonly known as hydrochloric acid

Muriatic acid: is a common name for hydrochloric acid, often used in industrial applications like cleaning pools and concrete.

Spirits of salt is another historical name for hydrochloric acid.

Chemical Formula: HCl.

Nature: It is a strong, corrosive mineral acid.

Appearance: A colorless solution with a distinctive, pungent odor.

Origin: It is formed when hydrogen chloride gas dissolves in water.

Explanation

Many soft drinks, especially colas, contain caffeine, a natural stimulant.

Caffeine helps to increase alertness and is added for flavor and stimulating effect.

Explanation

Water boils at 100 °C (at 1 atm pressure), and during boiling, the temperature stays constant.

The heat energy is used to convert water into steam rather than raising its temperature.

Explanation

Chlorine is a yellow-green poisonous gas at room temperature.

Thorium and Plutonium are solids.

Mercury is a liquid at room temperature.

Explanation

The elements of the periodic table sorted by atomic number

Atomic number Name chemical element                 Symbol

1                         Hydrogen                                             H

2                         Helium                                                     He

3                         Lithium                                                      Li

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RY 15-01-2023

Explanation

Symbol: K 

Origin: Derived from Neo-Latin kalium, referencing potash. 

Element: A chemical element in the alkali metal group of the periodic table. 

Atomic Number: 19. 

Discovery: The element was first isolated by Humphry Davy in 1807, who proposed the name potassium

The symbol K was later assigned by Berzelius. 

Explanation

Organic chemistry is the branch of chemistry that focuses on the structure, properties, composition, reactions, and preparation of compounds containing carbon.

While many organic compounds also contain hydrogen, oxygen, nitrogen, and other elements,

The defining element in organic chemistry is carbon.

Explanation

The atomic mass of sodium (Na) is approximately 23 atomic mass units (amu).

It is based on the sum of protons and neutrons in its most common isotope.

Explanation

The atomic number of chlorine is 17

Chlorine is a yellow-green gas at room temperature.

Symbol: Cl

Atomic mass: 35.453 u

Atomic number: 17

Boiling point: -34.04 °C

Melting point: -101.5 °C

Electrons per shell: 2, 8, 7

Electron configuration: [Ne] 3s²3p⁵

Explanation

The atomic number of sodium (Na) is 11

It is a soft, silvery-white, highly reactive metal.

Sodium is an alkali metal, being in group 1 of the periodic table.

Symbol: Na

Atomic mass: 22.989769 u

Electron configuration: [Ne] 3s¹

Melting point: 97.82 °C

Boiling point: 882.8 °C

Crystal structure: ​body-centered cubic (bcc) (cI2)

Sodium is the most common alkali metal

The sixth most abundant element on Earth, comprising 2.8 percent of Earth's crust.