If a substance is made up of a combination of atoms, then it is called a compound. Hence a water molecule (which is composed of three atoms, two hydrogen and one oxygen) is a compound.
Most materials are compounds. Only the noble gasses (like helium) exist in their elemental form naturally.
When a compound like salt dissolves in water, it is said to be undergoing a physical change, specifically known as dissolution. During dissolution, the ionic bonds holding the salt molecules together are broken, allowing the ions to disperse into the water, forming a homogeneous solution.
An oxide is a compound that contains oxygen and at least one other element that is less electronegative than oxygen.
Hydrogen is an element.
An element that can be hammered is called malleable.
An ionic compound consists of 2 or more elements that stick together (in a regular stacked pattern called a 'lattice') because one or more elements has a negative charge, and the other kind of element or elements have a positive charge. Opposites attract, just like magnets. Substances that are bonded together by ionic attraction are often said to be, "Salts". NaCl, or sodium chloride, is an example of an ionic compound, and is called table salt. Another example is Calcium Chloride, or de-icing salt. Notice that in each case, the first element listed is a metal - this is usually the case with ionic compounds.
An element is said to be chemically reactive when it combines with another element. These two elements will create a new compound.
A pure substance is an element or a compound.
A molecule is the smallest part of a compound that still retains the properties of said compound. As the atom is the smallest particle of an element into which it can be divided and still retain all the properties of that element, the molecule is the atom's analog for a compound.
By feeling if said element is "wet" -Dr. Bosch
Yes, water is matter. It is considered to be a liquid state of matter. Besides liquid there are gases and solids. Everything in the known universe can be classified as either matter or energy.
Copper is an element with the symbol Cu and atomic number 29. It is a pure substance made up of only copper atoms and cannot be broken down into simpler substances by chemical reactions, so it is not a compound.
When a compound like salt dissolves in water, it is said to be undergoing a physical change, specifically known as dissolution. During dissolution, the ionic bonds holding the salt molecules together are broken, allowing the ions to disperse into the water, forming a homogeneous solution.
go to bedDead, lead (element), led, bed, said, read, red and ahead.Butthead. :)
A molecule is the smallest part of a compound that still retains the properties of said compound. As the atom is the smallest particle of an element into which it can be divided and still retain all the properties of that element, the molecule is the atom's analog for a compound.
An oxide is a compound that contains oxygen and at least one other element that is less electronegative than oxygen.
Hydrogen is an element.
Water, H2O, is a molecule of hydrogen and oxygen. It is considered a compound. That said, yes, oxygen and hydrogen combine to make a compound that is represented by the molecule H2O.