Atoms can neither be created nor destroyed. Furthermore, atoms cannot be divided into smaller particles. Atoms of different elements can combine with each other in fixed whole-number ratios in order to form compounds. Atoms can be rearranged, combined, or separated in chemical reactions.
Can an atom be divided by a chemical reaction?
An individual atom can't be divided by a chemical reaction, only radioactive decay. Multiple atoms can be divided, but it requires reversible reactions, and the products formed from the backward reaction may be different compounds, so your atoms won't really be split as much as rearranged.
Can atoms combine with other atoms?
(c) Atoms can never combine with any other atoms. (d) Matter is composed of large particles called atoms. (a) about the same as that of a proton.
What is the definition of atom in chemistry?
(Show more) atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.
What determines the chemical properties of an atom?
Since it is the electrons that determine how one atom interacts with another, in the end it is the number of protons in the nucleus that determines the chemical properties of an atom.
Can an atom be divided or destroyed by chemical reactions?
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Can atom be divisible?
An atom is defined as the smallest individual particle of a matter. Atom was the indivisible particle up till Dalton's theory. Then in 1897 when J J Thomson discovered electrons he stated that atoms are divisible. Then new subatomic particles proton, electron, and neutron were discovered so now atom is divisible.
Why an atom Cannot be further divided?
All matter is composed of extremely small particles called atoms. Atoms of a given element are identical in size, mass, and other properties. Atoms of different elements differ in size, mass, and other properties. Atoms cannot be subdivided, created, or destroyed.
Can atoms be divided and still retain the properties of its original state?
a pure or elementary substance cannot be broken down into smaller or simpler constituents without loosing all its original properties; such pure substances are called elements. each element is made up of identical particles of matter called atoms.
Can atoms be divided yes or no?
Atoms cannot be subdivided, created, or destroyed. Atoms of different elements can combine in simple whole number ratios to form chemical compounds. In chemical reactions, atoms are combined, separated, or rearranged.
How can you prove that atoms are divisible?
In \[1897\] J.J Thomson discovered electrons while working on the gas discharge tube. And this discovery led to the fact that atoms are further divisible. He stated that may be atoms are divisible as he claimed that cathode rays are made up of negatively charged atoms that move towards the positively charged anodes.
Who said atoms Cannot be divided?
DaltonDalton went on to say that matter is made up of tiny particles, called atoms, that cannot be divided into smaller pieces and cannot be destroyed. He also stated that all atoms of the same element will be exactly the same and that atoms of different elements can combine to form compounds.
Can atoms Cannot be divided further?
Dalton thought atoms couldn't be divided further. But after J.J. Thomson discovered the electron, we came to know that there exist even smallers particles called electrons inside atoms. And later we found protons and neutrons.
Who says the atom is the smallest particle that Cannot be divided?
John DaltonJohn Dalton published his theory about atoms in the year 1808. His postulates were mainly based on the two laws of chemical combination namely, conservation of mass and constant proportion. From the above postulates we can conclude that the smallest particles of matter which cannot be further divided are atoms.
Can atoms be split into simpler parts?
Atoms cannot be created nor destroyed, and they are indestructible; they cannot be broken into smaller parts. This was based on the Law of Conservation of Mass. It was later learned that atoms can break into smaller parts. Chemical reactions involve a separation, combination, or rearrangement of atoms.
Can atoms be divided into smaller parts?
Atoms can be combined with other atoms to form molecules. However, they cannot be divided into smaller parts by ordinary means. Each individual atom is made up of smaller particles called electrons, protons and neutrons.
Can atoms be created and destroyed?
Since an atom is the basic unit of mass, atoms can neither be created nor be destroyed.
Are electrons divisible?
Electrons are elementary particles — indivisible, unbreakable. But new research suggests the electron's quantum state — the electron wave function — can be separated into many parts.
Are molecules divisible?
Yes, but by complex chemical processes.
Who said atoms are indivisible?
Democritus of AbderaThe atomic philosophy of the early Greeks Leucippus of Miletus (5th century bce) is thought to have originated the atomic philosophy. His famous disciple, Democritus of Abdera, named the building blocks of matter atomos, meaning literally “indivisible,” about 430 bce.
Are protons divisible?
Thus, protons and neutrons are no more indivisible than atoms are; indeed, they contain still smaller particles, which are called quarks.
What is an atom?
An atom is the basic building block of chemistry. It is the smallest unit into which matter can be divided without the release of electrically char...
Are all atoms the same size?
All atoms are roughly the same size, whether they have 3 or 90 electrons. Approximately 50 million atoms of solid matter lined up in a row would me...
What does the mass of an atom consist of?
The mass of an atom consists of the mass of the nucleus plus that of the electrons. That means the atomic mass unit is not exactly the same as the...
How is the atomic number of an atom defined?
The single most important characteristic of an atom is its atomic number (usually denoted by the letter Z), which is defined as the number of units...
What is the difference between a neutral and a neutral atom?
For example, if an atom has a Z of 6, it is carbon, while a Z of 92 corresponds to uranium. A neutral atom has an equal number of protons and electrons so that the positive and negative charges exactly balance.
What is matter made of?
Most matter consists of an agglomeration of molecules, which can be separated relatively easily. Molecules, in turn, are composed of atoms joined by chemical bonds that are more difficult to break. Each individual atom consists of smaller particles—namely, electrons and nuclei. These particles are electrically charged, and the electric forces on the charge are responsible for holding the atom together. Attempts to separate these smaller constituent particles require ever-increasing amounts of energy and result in the creation of new subatomic particles, many of which are charged.
How many protons are in a nucleus?
The fact that nuclei can have anywhere from 1 to nearly 300 protons and neutrons accounts for their wide variation in mass. The lightest nucleus, that of hydrogen, is 1,836 times more massive than an electron, while heavy nuclei are nearly 500,000 times more massive.
Why do we use complementary pictures of the atom?
Because of the nature of quantum mechanics, no single image has been entirely satisfactory at visualizing the atom’s various characteristics, which thus forces physicists to use complementary pictures of the atom to explain different properties. In some respects, the electrons in an atom behave like particles orbiting the nucleus. In others, the electrons behave like waves frozen in position around the nucleus. Such wave patterns, called orbitals, describe the distribution of individual electrons. The behaviour of an atom is strongly influenced by these orbital properties, and its chemical properties are determined by orbital groupings known as shells.
How much space does the nucleus take up?
It is in the same proportion to the atom as a marble is to a football field. In volume the nucleus takes up only 10 −14 metres of the space in the atom—i.e., 1 part in 100,000. A convenient unit of length for measuring nuclear sizes is the femtometre (fm), which equals 10 −15 metre.
How many atoms are in a row?
All atoms are roughly the same size, whether they have 3 or 90 electrons. Approximately 50 million atoms of solid matter lined up in a row would measure 1 cm (0.4 inch). A convenient unit of length for measuring atomic sizes is the angstrom (Å), defined as 10 −10 metre. The radius of an atom measures 1–2 Å.
Which part of an atom contains the most mass?
The nucleus is the positively charged centre of an atom and contains most of its mass. It is composed of protons, which have a positive charge, and neutrons, which have no charge. Protons, neutrons, and the electrons surrounding them are long-lived particles present in all ordinary, naturally occurring atoms.
Do protons and electrons have the same number?
the numbers of protons and electrons are equal.
Can atoms combine with other atoms?
Atoms can never combine with any other atoms.
Do atoms divide in chemical reactions?
atoms are not divided in chemical reactions.
