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myrzilka [38]
2 years ago
12

The atoms of a certain element each contain 19 protons and 1 valence electron. Which statement correctly identifies this element

and describes its chemical reactivity?
Chemistry
1 answer:
Leya [2.2K]2 years ago
3 0

Answer

its a potassium elements

Explanation:

K 2,8,8,1     period num 4

                  group 1A

or 1s1 ,2s2 2p6, 3s1

its a metal reacted  rapidly with water to form a colorless basic solution of potassium hydroxide (KOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.

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avanturin [10]
<span>I'm pretty sure it is called condensation</span>
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2 years ago
Which of the following describes what happens to the atom that was displaced in the reactant compound during a single replacemen
Marysya12 [62]

Answer: It becomes the uncombined element in the product.

Explanation:

The reaction between Zn and HCl is a single displacement reaction according to equation below

Zn + 2HCl —> ZnCl2 + H2

Zn displaces H2 from acid and in the product, hydrogen became the uncombined element.

3 0
3 years ago
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What is the iupac name of the following compound? <br><br> 2,2-dimethyl-4-ethylheptane
Lady bird [3.3K]

Answer:

The IUPAC name of the compound has already been given which is 2,2-dimethyl-4-ethylheptane.

Explanation:

The IUPAC (International Union of Pure and Applied Chemistry) is an authority in chemistry that provides a guideline and standardized methods in the naming of compounds formed from the periodic table.

In order the give an IUPAC name to a compound, certain steps needs to be followed, these includes:

--> Identify the functional group in the compound as this will form the suffix. For example if the functional group is an alkane the suffix will be -ane.

--> Identify the longest carbon chain (it may not be a straight chain) that contains the functional group. This forms the prefix. Example: if the longest carbon chain is 7 carbon atoms then the prefix will be hept-

--> All the carbons of the longest chain should be numbered

--> Identify branched groups on the chain and name them according to the number of carbon atoms. They usually end with -yl.

--> Finally, combine the elements of the name is a single word.

The structural formula of the IUPAC compound can be found in the attached file for a better understanding. The branched groups are circled.

4 0
3 years ago
What is the density of a liquid if the volume is 25 mL and the mass is 20.0 g?
LenKa [72]

Answers:  

                   Density = 0.8 g/mol.        

Given data:

                   v = 25 ml

                    m = 20 g

                    δ = ?

Solution:

               Formula for calculating density is given as,

                Density = Mass / Volume    

                 putting values  

                 Density = 20.0 g / 25 ml

                  Density = 0.8 g/mol.

3 0
3 years ago
Which tool is used to hold workpieces tightly so that both of your hands can be free to work on them? A. Snap-ring pliers B. Nee
gizmo_the_mogwai [7]
A vice, you can tighten it and then work on what is held in it without having to hold it still or in the position you want. 
8 0
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