Atom
An atom is the smallest unit of matter that retains all of the chemical properties of an element. For example,a gold coin is simply a very large number of gold atoms molded into the shape of a coin, with small amounts of other, contaminating elements. Gold atoms can’t be broken down into anything smaller while still retaining the properties of gold. A gold atom gets its properties from the tiny subatomic particles it’s made up of.
An atom consists of two regions.the first is the tiny “atomic nucles”,which is the center of the atom and contains positively charged particles called protons and neutral, uncharged, particles called neutrons. The second, much larger, region of the atom is a ‘cloud’ of electrons,negatively charged particles that orbit around the nucleus. Most atoms contain all three of these types of subatomic particles-protons, electrons, and neutrons.
Element
An element is a subtance made up to atoms of one kind. There are about naturally-occurring elements and about 31 artificially-made elements as listed in the Periodic Table. The elements are arranged according to increasing atomic numbers(along with their atomic mass) in a table called the Periodic Table.
Molecule
A molecule is formed when atoms of the same or different element combine. A molecule is the smallest particle of a substace that can normally exist independently. Example: Hydrogen and oxygen are combined in a molecule of oxygen (O2).
Compound
A compound is formed when atoms or molecules of different elements combine. In a compound,elements are chemically combined in a fixed proportion. Example: Hudrogen and oxygen are combined in a fixed proportion of 2:1 to form the compound water (H2O).
Mixture
Mixture are substances which are made by combining two or more different materials that have not reacted chemically with each other and hence can separated to individual components. Example in nature of a mixture is the salt water of seas and oceans.
Why salt water is mixture? give me your opinion
BalasHapusSalt water is a mixture, however, homogenous. This is because you can separate the salt from water by boiling the water. Salt deposition will have seen to occur.
BalasHapusCan you mention, how much element of this compound: CH3COOH, and Na(OH)2??
BalasHapusTo CH3COOH have 2 elements of C, 4 elements of H, and 2 elements of O.
HapusTo Na(OH)2 have 2 elements of O, 2 elements of H, and 1 element of Na.
What is an atomic nucleus?
BalasHapusThe atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.
HapusWhat is the difference of molecules and compounds? give me examples
BalasHapusA molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds.
HapusMolecular hydrogen (H2), molecular oxygen (O2) and molecular nitrogen (N2) are not compounds because each is composed of a single element. Water (H2O), carbon dioxide (CO2) and methane (CH4) are compounds because each is made from more than one element.
Please explain why atoms and molecules are different?
BalasHapusAn atom is smallest particle in an element that has the properties of the element. It is not possible to breakdown the atom further retaining the properties of the element. Atoms are not visible to the naked eye and are the basic building blocks. For example the atoms of element gold cannot be broken down further and each atom has the properties of gold.
HapusMolecules are formed by the combination of two or more atoms. Unlike atoms, molecules can be subdivided to individual atoms. The atoms are bonded together in a molecule. Molecules also are not visible to the naked eye, while can be seen through highly magnifying microscopes and other scientific devices. Water is comprised of numerous water molecules. Each water molecule is made up of one oxygen atom and two hydrogen atoms. So a water molecule can be further divided into oxygen and hydrogen atoms.
Matter is constantly changing. Ice in your soda melts, glass breaks, paper is ripped. When ice in your soda melts where does it go? What does it become?
BalasHapusIce melts faster in water than in soda. This is because soda has sodium (salt) in it, and adding sodium makes ice melt more slowly than it will in plain water. In order for ice to melt, the chemical bonds that join water molecules must be broken, and breaking bonds always requires energy. Adding sodium to a solution means that it takes more energy to break bonds than it takes in plain water, which slows melting.
HapusWhat are the 31 artificial elements you mentioned in the article you created?
BalasHapusAmericium,Curium,Berkelium,Californium,Einsteinium,Fermium,Mendelevium,Nobelium,Lawrencium,Rutherfordium,Dubnium,Seaborgium,Bohrium,Hassium,Meitnerium,Darmstadtium,Roentgenium,Copernicium,Nihonium ,Flerovium,Moscovium ,Livermorium,Tennessine,Oganesson ,Technetium,Promethium,Polonium,Astatine ,Francium ,Actinium ,Protactinium
HapusWhat are the differences between atoms and molecules?
BalasHapusAn atom is smallest particle in an element that has the properties of the element. It is not possible to breakdown the atom further retaining the properties of the element. Atoms are not visible to the naked eye and are the basic building blocks. For example the atoms of element gold cannot be broken down further and each atom has the properties of gold.
HapusMolecules are formed by the combination of two or more atoms. Unlike atoms, molecules can be subdivided to individual atoms. The atoms are bonded together in a molecule. Molecules also are not visible to the naked eye, while can be seen through highly magnifying microscopes and other scientific devices.