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pantera1 [17]
3 years ago
12

What information on the periodic table is used to complete electron dot diagrams? The number before the A at the top of a column

shows how many dots to draw in the diagram. The number before the B at the top of a column shows how many dots to draw in the diagram. The number at the left of each row shows the number of valence electrons that are in atoms of elements in that row. The number at the left of each row shows how many dots to draw above the symbol for elements in that row.
Chemistry
2 answers:
zmey [24]3 years ago
8 0
The answer is <span>The number before the A at the top of a column shows how many dots to draw in the diagram.</span>
Ann [662]3 years ago
8 0
<h3><u>Answer;</u></h3>

The number before the A at the top of a column shows how many dots to draw in the diagram.

<h3><u>Explanation</u>;</h3>
  • Electron dot structures are structures in which electrons are represented by dots placed around a chemical symbol. Therefore, in a dot diagram only the symbol for the element and the electrons in its outermost energy level are shown.
  • The reason as to why valence electrons are the only ones used in dot diagram is because; they are the only ones involved in chemical reactions and bonding, to make it easier to decide what it could be bonded to and its characteristics. Also to make it easier identify its placement on periodic table.
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Is there law of conversation of Volume? If two different liquids say you take 100ml of liquid A and 100 ml of liquid B and mix t
victus00 [196]

Answer:

200 mL

Explanation:

You simply add the volumes :) If this was a case that involved titration, you would use the formula M1V1 = M2V2. I do not know if that is what you were referring to but based on the information you gave, you simply add the two volumes.

4 0
3 years ago
A. monotomic ionic
ASHA 777 [7]

Answer:

Binary compound

Explanation:

Binary compounds:

The compounds which are made up of the atoms of only two elements are called binary compounds.

For example:

The following compounds are binary:

HCl

H₂O

NH₃

HCl is binary because it is composed of only hydrogen and chlorine. Ammonia is also binary compound because it is made up of only two elements nitrogen and hydrogen.

water is also binary because it is also made up of only two elements hydrogen and oxygen.

SF₆ is binary compound because it consist of atoms of only two elements i.e, sulfur and fluorine.

7 0
3 years ago
In what situation do we use a volumetric flask, conical flask, pipette and graduated cylinder? Explain your answer from accuracy
Ad libitum [116K]
A volumetric flask is used to contain a predetermined volume of substance and only measures that volume, for example 250 ml.
Conical flasks can be used to measure the volume of substances but the accuracy they provide is usually up to 10ml. Conical flasks are used in titrations, reactions where the liquid may boil, and reactions which involve stirring. 
Pippettes are of two types, volumetric and graduated. Pippettes are used where high accuracy is required and volumetric pippettes come in as little as 1 ml. Pippettes are usually used in titrations.
Graduated cylinders come in a wide variety of sizes and their accuracy can be down to as much as 1 ml. They are used to contain liquids.
3 0
3 years ago
What is the average atomic mass of chlorine if the mass of one isotope is 34.97 amu and has a p?er cent abundance of 75.77%. The
pishuonlain [190]

Answer : The average atomic mass of chlorine is, 32.37 amu

Explanation :

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i

As we are given that,

Mass of isotope 1 = 34.97 amu

Percentage abundance of isotope 1 = 75.77 %

Fractional abundance of isotope 1 = 0.7577

Mass of isotope 2 = 36.97 amu

Percentage abundance of isotope 2 = 24.23 %

Fractional abundance of isotope 2 = 0.2423

Now put all the given values in above formula, we get:

\text{Average atomic mass of element}=\sum[(34.97\times 0.7577)+(24.23\times 0.2423)]

\text{Average atomic mass of element}=32.37amu

Therefore, the average atomic mass of chlorine is, 32.37 amu

8 0
3 years ago
Identify the name of the compound that goes with this chemical formula:
Radda [10]
MgCl2 would be magnesium chloride.
6 0
3 years ago
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