What needs to happen to two or more elements as they combine to make a compound?

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

What is often given when two elements react together?

Chemical reactions and physical changes In a chemical reaction, chemical bonds between atoms are broken and made, so the atoms get rearranged into new substances. The simplest kind of chemical reactions involve two elements reacting together to make a compound .

What happens when you mix 2 compounds?

In simplest terms, a chemical change (or chemical reaction) occurs when two substances are mixed together and transform into a third substance. Not all substances react chemically when mixed together, however. For example, some substances, when mixed together, remain simply a mixture of those two substances.

Can two compounds react?

Reaction between two compounds: Two compounds react with each other to form a new compound. Example, calcium oxide (quick lime) reacts with carbon dioxide gas to form calcium carbonate (lime stone).

What is 2 or more atoms bonded together?

When two or more atoms chemically bond with each other, the resultant chemical structure is a molecule. Two or more atoms may bond with each other to form a molecule. When two hydrogens and an oxygen share electrons via covalent bonds, a water molecule is formed.

What happens when you combine elements?

When two or more elements combine to form a new substance, it is called a compound. There are many different types of compounds, because atoms of elements combine in many different ways to form different compounds. A compound is made when atoms of two or more elements bond in a chemical reaction.

Are compounds always chemically combined?

Elements can be chemically combined into compounds, therefore, a compound consists of two or more elements combined, in definite proportions, by chemical means. Compounds may be formed by combining atoms of their constituent elements by ionic bonds or by covalent bonds.

What happens to electrons when two elements react?

When metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms, forming ions. The resulting compound is called an ionic compound. In all of these reactions, the metal atoms give electrons to the non-metal atoms.

What do you get if you mix two compounds that do not react with each other chemically?

Answer: If two compounds that do not react chemically are mixed, we will simply get a mixture of compounds.

How do you tell if 2 compounds will react?

When deciding if a replacement reaction will occur, look up the two elements in question. The higher one will replace the lower one. Elements in the middle of the list will react with acids (but not water) to produce a salt and hydrogen gas. Elements at the bottom of the list are mostly nonreactive.

How do you tell if 2 elements will react?

The number of electrons determines how an element reacts. The number of protons gives the element its identity. Look at the different groups for clues to how the elements will react. Noble Gases usually do not react because they do not tend to gain or lose electrons.

What happens when two or more atoms react?

However, since not all elements have enough electrons to fill their outermost shells, atoms form chemical bonds with other atoms thereby obtaining the electrons they need to attain a stable electron configuration. When two or more atoms chemically bond with each other, the resultant chemical structure is a molecule.

What is the difference between solutions and elements and compounds?

Solutions – a special kind of mixture where one substance dissolves in another. Elements – simplest form of pure substance. They cannot be broken into anything else by physical or chemical means. Compounds – pure substances that are the unions of two or more elements. They can be broken into simpler substances by chemical means.

What are the properties of substances in a mixture?

The substances in a mixture retain their individual properties. –Solutions – a special kind of mixture where one substance dissolves in another. •Elements – simplest form of pure substance. They cannot be broken into anything else by physical or chemical means.

What happens when two solutes are added together?

When two solutions that contain ions as solutes are combined….. the ions might react. If they do, it’s always a double replacement reaction. Three products that might form: precipitates, water, or gases. Ionic equations that show all of the particles in a solution as they actually exist are called:

What happens when two ionic compounds are dissolved in water?

When ionic compounds dissolve in water, their ions separate. When two solutions that contain ions as solutes are combined….. the ions might react. If they do, it’s always a double replacement reaction. Three products that might form: precipitates, water, or gases.