Everything is made up of atoms. So, what makes up atoms? Atoms are made of protons, neutrons, and electrons, which are also called subatomic particles. Protons and neutrons are in the nucleus of the atom, while electrons are located in orbitals that surround the nucleus. ...
翻译：碳的原子质量是什么？
What makes one atom different from another atom? What is the mass, in grams, of 4.83 x 10^32 atoms of Be? What do atoms form when they share electron pairs? What subatomic particles (protons, neutrons, and or electrons) are found in the nucleus of an atom? Describe the atomic structur...
An atom has three types of very tiny particles called protons, neutrons and electrons. The center of an atom is called the nucleus, and it is made up of protons and neutrons. The electrons in an atom fly around and above the nucleus in a cloud-like formation. The protons have a positiv...
Although the SI unit of mass is the kilogram, the atomic mass is often expressed in the non SI-unit dalton, where one dalton is defined 1/12 of the mass of a single carbon-12 atom, at rest. The protons and neutrons of the nucleus account for nearly...
Learn about atoms, the fundamental unit of matter in the universe. Discover the different parts of an atom, such as the nucleus, proton, neutron,...
About three quarters of the sun is hydrogen, which is constantly fusing together and creating helium by a process called nuclear fusion. Helium makes up almost
This description makes more sense the more chemistry you have studied because a large aspect of the study of chemistry concerns learning about how, why and when certain substances, all of which are made-up of atoms or of atoms that have joined together to form molecules, change in structure ...
that would otherwise push the protons apart, according to the rules of electricity. Some atomic nuclei are unstable because the binding force varies for different atoms based on the size of the nucleus. These atoms will then decay into other elements, such as carbon-14 decaying into nitrogen-...
DNA is made up of molecules called nucleotides. Each nucleotide contains three components: a phosphate group, which is one phosphorus atom bonded to four oxygen atoms; a sugar molecule; and anitrogenbase. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytos...