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4 years ago

Which contains elements with similar properties in the periodic table? A. a period B. a column C. a row

Chemistry

2 answers:

Dima020 [189]4 years ago

7 0

That would be a column (called a group)

Semmy [17]4 years ago

6 0

Answer: Option (B) is the correct answer.

Explanation:

Elements of a group represent similar chemical properties because they contain same number of valence electrons which determines their reactivity.

Hence, elements of a group have same chemical nature or property.

A group is represented by a vertical column in a periodic table.

On the other hand, a period is represented by a horizontal line.

Thus, we can conclude that a column contains elements with similar properties in the periodic table.

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Please help this will determine my grade so I beg help me out and my grade

Lelu [443]

Answer:

C: checking your email

Explanation:

I believe that C would be impossible, as you cannot use wireless networks without radio waves

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3 years ago

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The atomic masses of 35-Cl (75.53 percent) and 37-Cl (24.47 percent) are 34.968 amu and 36.956 amu, respectively. Calculate the

AlladinOne [14]

Answer:

35.45 amu is the average atomic mass of chlorine.

Explanation:

The average atomic mass is given :

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

Atomic mass of 35-Cl = 34.968 amu

Percentage abundance of 35-Cl = 75.53%

Fractional abundance of 35-Cl = 0.7553

Atomic mass of 37-Cl = 36.956 amu

Percentage abundance of 37-Cl = 24.47%

Fractional abundance of 37-Cl = 0.2447

Average atomic mass of chlorine:

$=34.968 amu\times 0.7553+36.956 amu\times 0.2447=35.45 amu$

35.45 amu is the average atomic mass of chlorine.

4 0

4 years ago

The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic.

Firlakuza [10]

<u>Answer:</u> The hydrogen ion concentration of his saliva is $7.94\times 10^{-7}M$

<u>Explanation:</u>

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution.

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

pH of the saliva = 6.1

Putting values in above equation, we get:

$6.1=-\log[H^+]$

$[H^+]=10^{-6.1}=7.94\times 10^{-7}M$

Hence, the hydrogen ion concentration of his saliva is $7.94\times 10^{-7}M$

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3 years ago

How do some deep-sea animals use their bioluminescence, or ability to give off light? (

Svetlanka [38]

Certain fish species use bioluminescence as a form of "night light". Some use it for communication. Certain species of crustaceans send out coded signals to others of their own kind during mating season. Other creatures use bioluminescence as a trap.

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2 years ago

Answer ASAP plzzz ! Will give Brainliest !

vesna_86 [32]

Answer:

27 mL

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

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4 years ago