Question

B. Fill in the blanks.
1. A chemical reaction is represented by a_______ _______.
2. Elements are represented in chemical
equations by______
3. A chemical reaction that gives out heat is_____
reaction.
called an
4. When silver nitrate and sodium chloride are
mixed together, a white_______
of silver
chloride is formed.​

Answer 1

Answer:

1. A chemical reaction is a rearrangement of atoms in which one or more compounds are changed into new compounds. All chemical reactions can be represented by equations and models.

2. Chemical formulas are used to describe the types of atoms and their numbers in an element or compound. The atoms of each element are represented by one or two different letters. When more than one atom of a specific element is found in a molecule, a subscript is used to indicate this in the chemical formula.

Explanation:

Answer 2

Answer:

(i) Combination reaction.

(ii) Double displacement reaction.

(iii) Decomposition reaction

(iv) Sulphur

Explanation:

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