CHEMISTRY HIGH SCHOOL

Which elements have the most similar chemical properties?A. Si, As, and Te
B. Mg, Sr, and Ba
C. N2, O2, and F2
D. Ca, Cs, and Cu

Please explain your answer in this case

Answers

Answer 1
Answer:

The elements that have the most similar chemical properties are \boxed{{\text{B}}{\text{. Mg, Sr, Ba}}}.

Further Explanation:

Periodic table:

Elements are arranged in increasing order of their atomic numbers in various rows and columns. Such tabular arrangement is called a periodic table. The elements with the same chemical and physical properties lie in the same group. Horizontal rows are called periods and vertical columns are called groups. There are 18 groups and 7 periods in a periodic table.

Elements are also classified as metals, non-metals, and metalloids in this table. The elements placed at the left side of the table are metals while those placed at the right of the table are non-metals. Metalloids are elements that are placed between metals and non-metals.

Magnesium, strontium, and barium belong to group 2A of the periodic table. These have two valence electrons in their outermost shell. So these three elements have similar chemical properties. But the other given elements do not lie in same group so they have different chemical properties.

Therefore option B is the correct answer.

Learn more:

  1. Which ion was formed by providing the second ionization energy? brainly.com/question/1398705
  2. Write a chemical equation representing the first ionization energy for lithium: brainly.com/question/5880605

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Periodic classification of elements

Keywords: magnesium, strontium, barium, Mg, Ba, Sr, periodic table, elements, group, period, chemical properties, similar.

Answer 2
Answer:

Chemical properties are characteristics of a substance that describe how it interacts or reacts with other substances, leading to changes in its composition or structure. The correct answer is C. N₂, O₂, and F₂.

These properties help define the chemical behavior of a substance and are determined by its chemical composition and atomic/molecular structure.

N₂ (nitrogen gas), O₂ (oxygen gas), and F₂ (fluorine gas) belong to the same group/family on the periodic table, known as group 16 or the oxygen family. Elements within the same group tend to have similar chemical properties because they have the same number of valence electrons, which are the electrons involved in chemical bonding.

In the case of N₂, O₂, and F₂, they all have six valence electrons. This similarity in electron configuration leads to comparable chemical behavior, including their tendency to form covalent bonds, their reactivity, and their ability to gain electrons to achieve a stable octet.

Therefore, the correct answer is C. N₂, O₂, and F₂.

For more details regarding chemical properties, visit:

brainly.com/question/1728902

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Which of the following metal atoms would have the highest conductivity?

Answers

Conductivity is a way that an atom reacts. Therefore, when we say "highest" we mean the most reactive. Elements or atoms that are highly reactive are those that want to be stable. Therefore, the atoms that have 7 valence electrons would be highly reactive because they need 1 more electron to fill their outer energy shell to become stable. 

Answer:The atom with the largest radius and the most valence electrons.

Explanation:it just makes sense and it’s also right.

Which type of reaction occurs when nonmetal atoms become negative nonmetal ions?A. oxidation
B. reduction
C. substitution
D. condensation

Answers

Answer: Option (B) is the correct answer.

Explanation:

When an atom gains electrons then it becomes rich in electrons and therefore it acquires a negative charge.

Also, it is known that a reduction reaction is a reaction in which an element gain electron(s).

For example, Br_(2) + 2e^(-) \rightarrow 2Br^(-) is a reduction reaction.

Thus, we can conclude that when nonmetal atoms become negative nonmetal ions then type of reaction which occurs is reduction reaction.
The answer is B. reduction. The atom becoming negative ions means it gains electrons. The reaction which gain electrons is reduction reaction. So the answer is B.

Which was a testable idea that J.J. Thomson developed through his experiments?Atoms are the most important substances in the universe.
It is impossible to divide an atom into smaller parts.
There are electrically neutral particles inside atoms.
Atoms contain small, negatively charged particles.

Answers

Atoms contains small, negatively charged particles. His experiment showed that an atom contains negatively charged particles which was later known as electrons. This was confirmed by the Cathode Ray Experiment he conducted. 

Answer: The correct statement is atoms contain small, negatively charged particles.

Explanation:

J.J.Thomson was a scientist which discovered electrons that are present in an atom.

He did an experiment and gave a model for this. The experiment conducted by him was Cathode Ray experiment and the model given by him was Plum pudding model.

From cathode ray, he showed that the cathode ray was composed of a negatively charged particles and named it as electrons. From plum pudding experiment, he said that the electrons are embedded in the atom. These particles carry negative charge and are very small as compared to the atom.

Hence, the correct statement is atoms contain small, negatively charged particles.

Use exponential notation to express the number 385,500 ha. one significant figure.
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Answers

To express the number 385,500 hours using exponential notation with a specific number of significant figures, you can use the following steps:

a. One significant figure:
- Expressing 385,500 as 3.9 × 10^5 hours (rounded to one significant figure).

b. Two significant figures:
- Expressing 385,500 as 3.9 × 10^5 hours (rounded to two significant figures).

c. Three significant figures:
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d. Five significant figures:
- Expressing 385,500 as 3.8550 × 10^5 hours (rounded to five significant figures).

Keep in mind that the exponential notation represents the same value but with the specified number of significant figures.

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Answers

I think your guess is correct

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Answers

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Hence, the food that we eat is a source of energy. The chemical energy stored in food, is utilized for various function of body such as breathing, walking, talking, etc. Now, if you body does not have chemical energy, if will not be able to perform various task, which are essential for living. 

Due to this, absence of  chemical energy in the body, can will eventually lead to death.
If you body does not have chemical energy it will slowly shut down due to its metabolism not being able to intake more food and water. This will eventually lead to death.
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