Define the si units for length, mass, time and temperature

Length: meter (m)

mass: kilogram (kg)

time: second (s)

temperature: Kelvin (K)

Explanation:

The International System of Units (SI) is used in almost every country in the world.  

This system was created in 1960 by the 11th General Conference of Weights and Measures in France and is made up of seven basic units:  

-Ampere (electric current)  

-Kelvin   (temperature)  

-Second   (time)  

-Meter   (length)  

-Kilogram   (mass)  

-Candela   (luminous intensity)  

-Mol (amount of substance) *added to the system in 1971  

Plus an unlimited number of derived units from the main ones.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

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