2 years ago

7. What do all elements in the same period on the periodic table have in common?

Chemistry

1 answer:

zalisa [80]2 years ago

6 0

Answer:

they have same number of electrons

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Answer:sksk

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3 years ago

How are Newton's three laws of motion related

OLga [1]

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

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3 years ago

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Give chemical equation representing ionisation of carbonic acid

boyakko [2]

Answer:

HCO3− + OH− ⇌ CO32− + H2O

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3 years ago

List three factors that affect the rate of a chemical reaction<br>

Darina [25.2K]

Explanation:

Three factors that affect the rate of a chemical reaction

are listed below:

1.presence/absence of catalyst

2.temperature

3.nature of reactants

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6 0

3 years ago

If an element is a reactant or product in a chemical reaction, the reaction must be an oxidaton-reduction reaction. Why is this

Bezzdna [24]

Explanation:

Oxidation reduction reactions are the reactions in which one specie oxidizes and other reduces.

For example,

$2Na+2HCl\rightarrow H_2+2NaCl$

This is a oxidation reduction reaction because sodium in elemental state ( 0 oxidation state) oxidizes to Na⁺ in NaCl. Also H⁺ in HCl reduces to H° in H₂.

Elements are present in 0 oxidation state and either it is formed or consumed, its oxidation state has to be changed for a chemical reaction to occur. Hence, it is true.

8 0

4 years ago