Answer:
The metallic elements have more metallic characteristcis.
Explanation:
- Metallic character is the name given to a set of common properties shared by the metallic elements.
- Metallic luster, high density, high electric and thermal conductivity are some physical properties associated with metallic characters.
- Malleability and ductility is also an important metallic characteristic.
- Generally the metals are hard and dense.
- The elements on the left hand side of the periodic table show metallic characteristics except hydrogen.
Answer: C is the correct answer
Explanation:
A precipitate is a product of a reaction that is insoluble in the reaction medium (usually water).
Why?
One of the signs that a reaction happened is that a precipitate forms. Let's take the reaction between Silver Nitrate (AgNO₃) and Sodium Chloride (NaCl) as an example:
AgNO₃(aq) + NaCl(aq) → AgCl(s)↓ + NaNO₃(aq)
In this reaction, Silver Chloride (AgCl) is an insoluble product of the reaction, and precipitates out of the reaction medium
If we write down the ionic equation, we find out the following:
Ag⁺ + NO₃⁻ + Na⁺ + Cl⁻ → AgCl(s) + Na⁺ + NO₃⁻
The ions that appear at both sides of the arrow are called spectator ions, since they are not directly involved in the process of the reaction, making the net ionic equation to be:
Ag⁺ + NO₃⁻ → AgCl(s)
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Answer: The correct option is C.
Explanation: Beta minus ( 
) decay is the decay in which a neutron is converted into proton and releases beta particle or generally known as electron.
There is an increase in the Atomic number because one protons is being formed.
In the case of beta-minus decay of phosphorous, the P-nucleus gets changed to Sulfur nucleus. The balanced Chemical equation for this process is:
Hence, the correct option is C.
An experimental investigation allows you to control the variables.
Explanation:
Experimental investigations include a method in which a "fair test" is created and variables are actively planned, managed, and measured in an attempt to gather testimony to confirm or negate a causal relationship. Experimental investigations have a control group which does not accept any treatment.
