A quark is what makes up atoms. Quarks cannot be found in nature and it is impossible to see even with the most powerful microscope in the world.
atom
A single molecule of hydrogen is the smallest substance. It consists of jut two protons and two electrons.
They use a force called bonding where they either gain or lose an electron.
A beta particle is either an electron or an anti-electron (aka positron).
The smallest organism on Earth is a nanobe
Either an Alpha particle or Beta particle depending on what isotope it comes from
The smallest unit of life that can exist as a separate entity is a cell.
The smallest part of any chemical element that can exist is an atom of that element. The smallest part of a chemical compound that can exist is a molecule of that compound.
Either an atom or a molecule, depending on the substance.
Either an atom or a molecule, depending on the substance.
a.molecule
The main negatively charged particle in an atom is the electron. The electron controls the reactivity of an element. An even smaller particle is a quark, which composes protons and neutrons. Quarks can be either positively or negatively charged.
A single molecule of hydrogen is the smallest substance. It consists of jut two protons and two electrons.
They use a force called bonding where they either gain or lose an electron.
An atom is the smallest particle of a chemical element that retains its chemical properties. A molecule is the smallest amount of a substance that consists of a number of atoms of the same or of different elements.
An atom is the smallest bit of an element that you can have. It contains a nucleus (which is made up of protons and (with the exception of hydrogen) neutrons. Around the nucleus are electrons. The quantity of all these things will depend on what element we are talking about amd are specific to that element. If you go any smaller then you do not have the element any more (apart from the situation where one or more electrons can be lost to or gained from another element when the two elements combine in a compound). A combination of atoms, either the same type of atoms or different ones, is called a molecule. So, an atom is the smallest whole piece of an element, and it conatins electrons. One or more atoms joined together is a molecule.
An element can be described as a spherical structure having a nucleus in the center, which consists either of a single proton in the case of the lightest hydrogen isotope, or which in all other cases has a nucleus consisting of some combination of protons and neutrons. An atom also has an outer layer of electrons surrounding the nucleus. A compound consists of two or more atoms which are bound together by either the exchange or sharing of their electrons.
An atom is the smallest possible amount of matter which retains its identity as a chemical element. The first recorded sense of the word "atom" has a different meaning entirely - it was a period of time equal to 15/94 of a second.