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Inessa [10]
3 years ago
11

using what you know about electron configurations explain the notion that elements in the same column in the periodic table have

similar chemical and physical properties
Chemistry
1 answer:
Levart [38]3 years ago
5 0

Answer:

Two elements in same group having similar properties.

Explanation:

The elements shows similar properties if they have same number of valance electrons.

As we move left to right in periodic table the number of valance electrons increases in case of every element

When we move top to down in the group of periodic table the number of valance electrons remain same. So the elements in same group shows similar properties.

For example:

Fluorine and chlorine are present in same group, both have same valance electrons so they shows similar properties.

Electronic configuration of fluorine.

F₉ = [He] 2s² 2p⁵

Electronic configuration of chlorine.

Cl₁₇ = [Ne] 3s² 3p⁵

Both have same number of valance electrons that's why showing similar physical and chemical properties.

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A sound wave is traveling at 331 m/s and has a frequency of 126 Hz. What is the wavelength?​
damaskus [11]
<h2>Answer</h2>

2.626984127 m

<h2>Explanation:</h2><h2></h2>

You have to know the equation that relates wavelength, frequency, and velocity (it's like speed but a bit different).

v = f x λ

where:

v = velocity

f = frequency

λ = Wavelength

Rearrange to make λ subject:

λ = v / f

We've been given 331 as the speed, 126 as the frequency. Sub it into the equation:

331 / 126 = 2.626984127 m

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3 years ago
The sum of protons and neutrons in an atom is called the.
tresset_1 [31]
Atomic mass / mass number / atomic weight

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2 years ago
Which of the following correctly describes a compound?
Nutka1998 [239]

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A compound may be splitted into simpler substances by chemical reactions, and has different properties to those of the elements that form it.


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Some examples of compounds are H₂O, NaCl, H₂O₂, CH₃COOH. As you see, they have a chemical formula which states the kind and number of the atoms that form them.


They are different to mixtures, which are formed by two or more compounds, in a variable proportion, and can be separated by physical media. Some examples of mixtures are the solutions (e.g. NaCl dissolved in H₂O), and some solid mixtures (e.g. a mixture of marbles and sand).

3 0
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Please help me with this friends.​
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Where is the picture to this?
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