Which of the following two elements will likely form a covalent bond? N and O K and Cl Li and F Na and Sr
Answers
Answer: N and O
Explanation:
An ionic bond is formed when a metal completely transfers its valence electron to a non metal.
Covalent bond is formed by sharing of electrons between two non metals.
A. N and O both are non metals and thus form a covalent bond.
B. K is a metal and Cl is a non metal and thus form an ionic bond.
C. Li is a metal and F is a non metal and thus form an ionic bond.
D. Na and Sr both are metals
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3. Rank each of the following in order of DECREASING atomic radiusa. Cl, Br, Ga
In chemistry, there are three commonly encountered theories to explain what acids and bases are and what they do. Name these theories and describe what each one states about acids and bases. Give an example to help describe each of the types. Make sure to explain how these theories differ from each other. (Properties of Acids and Bases)
Which of these is an appropriate instrument to measure mass?balance burette ruler graduated cylinder
(1) Rb (3) Si
(2) Rn (4) Sr
Answers
Element which has both metallic and non-metallic properties is silicon as it is a metalloid.
What are metalloids?
Metalloids are defined as the elements which possess properties of both metals as well as non-metals.These elements are present only in the p-block of the periodic table.
In the p-block of the periodic table, these are the elements which separate the metals from the non metals by forming a zig-zag line between them.
These elements have 4 electrons in their valence shell which indicates that they can neither loose nor accept electrons rather share them between the 2 atoms.
As the elements are present between metals and non-metals they resemble both categories of elements in terms of their properties.They usually possess metallic appearances but are brittle.
Chemically, the behave as non-metals and have a characteristic property of forming alloys.They can form amphoteric or weakly acidic oxides.
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Answers
Answer:
The theoretical yield of copper is 79.6281 g
Explanation:
Moles of copper sulfate =
According to reaction 1 mol of copper sulfate gives 1 mol of copper .
Then 1.2530 mol of copper sulfate will gives :
of copper .
Mass of 1.2530 mol of copper :
1.2530 mol × 63.55 g/mol = 79.6281 g
The theoretical yield of copper is 79.6281 g
Answers
HCl + NaOh ----> NaCl + H2O
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Answer:
Corona
Explanation:
The outermost layer of the sun's atmosphere is called the corona, meaning “crown.” The corona is formed of thin wisps of gas that extend outward into space for millions of miles. It is much less bright than the photosphere, so we can only see it if the rest of the sun is blotted out, for example during a solar eclipse.
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Answers
Answer:
The correct answer is option c) water and salts
Explanation:
Organic compounds contain carbon and hydrogen bonds. Both nucleic acids and proteins contain these. Water (H2O) and salts (Ex:NaCl) do not.
Final answer:
The pair of compounds that can be classified as inorganic from the given options are water and salts. These lack a carbon-hydrogen bond, unlike nucleic acids and proteins, which are organic.
Explanation:
The pair of compounds that can be classified as inorganic are water and salts. Inorganic compounds are defined as compounds that do not contain a carbon-hydrogen bond, which makes them different from organic compounds. Both water (H2O) and salts, like table salt (NaCl), do not contain any carbon-hydrogen bonds, so they are considered inorganic compounds. On the other hand, nucleic acids and proteins are both complex structures that include carbon-hydrogen bonds, making them organic compounds.
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