The formation of a compound by the union ; of elements is called?

The formation of a compound by the
union ; of elements is called?
by

1 Answer

Answer :

Synthesis Examples: Water; Steam; Salt etc. .
by

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Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements. (A) The same (B) Less than (C) Greater than (D) Different than

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Last Answer : Ans. Negative.

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Compound in which carbons use only sp3 hybrid orbitals for bond formation is (a) CH3CH2CH3 (b) CH3C≡CH (c) CH3CH=CH2 (d) CH2=CH—CH=CH2

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Pick out the correct statement. (A) If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container, the temperature of the liquid will increase (B) A process is irreversible as long as Δ S for the system is greater than zero (C) The mechanical work done by a system is always equal to∫P.dV (D) The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants

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Last Answer : (D) The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants

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Last Answer : c) Chromium

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There is no connection of supernova explosion with------? A. Cosmic rays B. Pulsars C. The formation of heavy elements D. Quasars (Answer)

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Last Answer : D. Quasars (Answer)

Since the enthalpy of elements in their natural state is taken to be zero, the heat of formation `(Delta_(f)H)` of compounds

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Last Answer : Since the enthalpy of elements in their natural state is taken to be zero, the heat of formation `( ... C. is zero D. May be positive or negative

For the formation of cell-components the elements required are a. Nitrogen b. Oxygen c. Sulphur d. All of these

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Last Answer : Ans: D

Name either of the elements which, in the form of oxides, contributes to the formation of acid rain.

Description : Name either of the elements which, in the form of oxides, contributes to the formation of acid rain.

Last Answer : ANSWER: NITROGEN OR SULFUR

What is a chemical reaction in which 2 elements combine to form a compound is called?

Description : What is a chemical reaction in which 2 elements combine to form a compound is called?

Last Answer : Feel Free to Answer

The binary compound of Hydrogen with S block elements are called as ------------------

Description : The binary compound of Hydrogen with S block elements are called as ------------------

Last Answer : Ans: ionic hydride

What is a dog elements or mixture or compound?

Description : What is a dog elements or mixture or compound?

Last Answer : Need answer

What is popcorn it is elements or mixture or compound?

Description : What is popcorn it is elements or mixture or compound?

Last Answer : Need answer

How do you find the number of elements in a compound?

Description : How do you find the number of elements in a compound?

Last Answer : The number of elements in a compound is determined by chemicalanalysis.

How is compound made from hydrogen and oxygen different from these mixtures of these two elements?

Description : How is compound made from hydrogen and oxygen different from these mixtures of these two elements?

Last Answer : In a compound chemical elements are linked by chemical bonds.

What is a combination of symbols that show the ratio of elements in a compound?

Description : What is a combination of symbols that show the ratio of elements in a compound?

Last Answer : This is the chemical formula of a compound.

What is the formula of the ionic compound expected to form between the elements sulfur and aluminum?

Description : What is the formula of the ionic compound expected to form between the elements sulfur and aluminum?

Last Answer : The aluminum ion is Al3+ and the sulfide ion is S2-. The formula for aluminum sulfide is Al2S3. In an ionic compound, the size of the charge of each ion becomes the subscript on the opposite ion. This is called the crisscross rule. https://www.YouTube.com/watch?v=99NVKAss5LE&t=240s

What is he smallest whole number ratio of the elements in an ionic or covalent compound?

Description : What is he smallest whole number ratio of the elements in an ionic or covalent compound?

Last Answer : Need answer

What is the formula for a compound formed from the elements Al and S?

Description : What is the formula for a compound formed from the elements Al and S?

Last Answer : Al and S combine to form aluminum sulfide, Al2S3

When elements that are never found free in nature but are always found combined in a compound are the?

Description : When elements that are never found free in nature but are always found combined in a compound are the?

Last Answer : These elements are very reactive.

What elements need to be present for a compound to be considered organic?

Description : What elements need to be present for a compound to be considered organic?

Last Answer : The indispensable chemical element is carbon.

Are the properties of a compound are always the same as the properties of the elements in a compound?

Description : Are the properties of a compound are always the same as the properties of the elements in a compound?

Last Answer : Not always. For example sodium (Na), a metal that reacts violently with water, and chlorine (Cl), a yellow poisonous gas, combine to make table salt, which has none of these properties. But in others cases there are some similarities, like in a metal alloy.

What is the formula of the ionic compound expected to form between the elements K and S?

Description : What is the formula of the ionic compound expected to form between the elements K and S?

Last Answer : Ca2+ + 2 I- --> CaI2

The reactivity of an ionic compound element is explained as its tendency to attain noble gas configuration. How do the elements do so? (1) Lose electrons (2) Gain electrons (3) Both are correct (4) Both are incorrect

Description : The reactivity of an ionic compound element is explained as its tendency to attain noble gas configuration. How do the elements do so? (1) Lose electrons (2) Gain electrons (3) Both are correct (4) Both are incorrect

Last Answer : (3) Both are correct Explanation: The reactivity of elements is explained as their tendency to attain a completely filled outer shell. This is called as having attained noble gas configuration. Once noble gas configuration is reached, the elements lose their reactivity.

Which of the following elements is found in the earth's crust as both a native element and as a compound? w) argon x) copper y) chlorine z) silicon

Description : Which of the following elements is found in the earth's crust as both a native element and as a compound? w) argon x) copper y) chlorine z) silicon

Last Answer : ANSWER: X -- COPPER

Which of the following elements would form an acid oxide with the formula XO2 and an acidic compound with hydrogen with the formula XH2? w) Sodium x) Magnesium y) Aluminum z) Sulfur

Description : Which of the following elements would form an acid oxide with the formula XO2 and an acidic compound with hydrogen with the formula XH2? w) Sodium x) Magnesium y) Aluminum z) Sulfur

Last Answer : ANSWER: Z -- SULFUR