CHEMISTRY HIGH SCHOOL

What does the term compound mean?

Answers

Answer 1
Answer: A compound is a substance formed when two or more chemical elements are chemically bonded together.
Answer 2
Answer: compound is a thing that is composed of two or more separate elements; a mixture

Related Questions

Based on their locations in the periodic table, which of these elements would you expect to have the greatest atomic radius?A. cesium (Cs) B. lithium (Li) C. neon (Ne) D. radon (Rn)
Given the balanced equation:2KClO3==> 2KCl + 3O2Which type of reaction is represented by this equation?(1) synthesis(2) decomposition(3) single replacement(4) double replacement
Which of the following is one way to prevent the corrosion of iron
In a chemical equation, what name does the left side have
Which formula represents a nonpolar molecule containing polar covalent bonds?(1) H2O (3) NH3(2) CCl4 (4) H2

A 182 pound male body was found decomposing in a dense wooded area 1.43 kilometers away from the nearest road. How many meters would a suspect have to drag the body into the woods if the victim was already deceased and transferred to this secondary location from the vehicle

Answers

Answer:

1430 meters

Explanation:

How many electrons does calcium lose when forming an ionic bond with another ion?a. 1
b. 2
c. 3
d. 4

Answers

The correct answer is answer choice B, 2. Calcium is in Column 2, meaning that it has 2 electrons in its outermost energy level. These two electrons must be lost for it to form an ionic bond with another element and become stable.

Questions like these can be easily answered if you have a periodic table on hand. Elements in Column 1 need to lose 1 electron to form ionic bonds, elements in Column 2 need to lose 2, and so on. Keep in mind, however, that elements in the center of the table are more likely to form metallic or covalent bonds, and elements in Columns 16 and 17 need to gain 2 and 1 electrons, respectively.

A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.Experimental Group:


Control Group:

Answers

Experimental group is the ducks in cold water
And the control group is the ducks in room temperature water

Final answer:

In the experiment, the Experimental Group represents ducks in cold water, while the Control Group represents ducks in room temperature water. The scientist is testing whether water temperature affects duck swimming speed.

Explanation:

In the experiment described, the scientist is exploring whether the temperature of the water affects the speed of swimming of ducks. The Experimental Group in this scenario represents the ducks that are swimming in cold water. The scientist expects that these ducks will swim faster, based on the original hypothesis. On the other hand, the Control Group represents the ducks that are swimming in room temperature water. This group serves a basis for comparison to help the scientist determine what changes (if any) occur when the variable (water temperature) is altered.

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A color change happens during an experiment mixing two liquids. Is this a physical change or chemical change?

Answers

The color change would only effect the appearance of the substance, so it would be a physical change. 

Answer: physical change

select all the correct answers. Which conditions are required for nuclear fusion to begin? The gas cloud must be very dense. Gravitational attraction must stop. Atoms must be stripped of their electrons. Helium atoms must break down into hydrogen. Temperatures must exceed 14 million Kelvin.

Answers

Nuclear fusion is the process in which atomic nuclei come together to form heavier nuclei, releasing large amounts of energy in the process. The correct statements are The gas cloud must be very dense, Atoms must be stripped of their electrons, and Temperatures must exceed 14 million Kelvin.

For fusion to occur, certain conditions must be met. The gas cloud or plasma must be dense enough to allow for a sufficient number of collisions between atomic nuclei. Gravitational attraction, on the other hand, is necessary to bring the atomic nuclei close enough together for the strong nuclear force to overcome the electrostatic repulsion between positively charged nuclei.

Atoms must be stripped of their electrons because, in a plasma state, the atoms are ionized, meaning they have lost or gained electrons and exist as charged particles.

Hence, the correct statements are The gas cloud must be very dense, Atoms must be stripped of their electrons, and Temperatures must exceed 14 million Kelvin.

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Answer:

The gas cloud must be very dense.Temperatures must exceed 14 million Kelvin

A chemical change involves the formation or the breaking of bonds. true or false

Answers

Answer: The given statement is true.

Explanation:

A chemical change is a change that causes change in chemical composition of a substance.

This change is due to the exchange of electrons that lead to the formation or breaking of bonds.

For example, sodium atom on donating an electron to chlorine atom forms an ionic bond due to transfer of electron.

This formation of ionic bond leads to the formation of a new compound named as sodium chloride.

Therefore, we can conclude that the statement a chemical change involves the formation or the breaking of bonds, is true.

Final answer:

Chemical change involves the formation or breaking of bonds, leading to the formation of new substances.

Explanation:

A chemical change involves the formation or breaking of bonds. When a chemical change occurs, the atoms rearrange themselves, leading to the formation of new substances with different properties. This is different from a physical change, where no new substances are formed.

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Other Questions
Which of the following refers to the process of hydrolysis?A.) In hydrolysis, a molecule of water is released when two molecules are joined together. B.) The end result of hydrolysis is a chain of molecules such as a polysaccharide. C.) Water is needed for hydrolysis to take place. D.) Hydrolysis is the process in which plants and animals create complex molecules such as carbohydrates and proteins.
In which sample do molecules have the greatest average kinetic energy? A.) He at 100 K. B.) H2 at 200 K. C.) O2 at 300 K. D.) H2O at 400 K.
Which of the following processes would you predict to have an increase in entropy?condensation of water freezing water melting ice deposition of CO2 (changing from a gas to solid)
A substance has an empirical formula of CH2 and a molar mass of 56 grams per mole. The molecular formula for this compound is(1) CH2 (3) C4H8(2) C4H6 (4) C8H4