百度试题 结果1 题目5 How many neutrons are present in the atom X? B A 21 B 24 C 45 D 66 相关知识点: 试题来源: 解析 B 反馈 收藏
aIf you study hard, you ___ the examination. 如果您艰苦学习,您___考试。[translate] aHow many neutrons are there in the nucleus of a Th-232 atom 多少个中子那里在Th232原子的中坚力量[translate]
How can you calculate the number of neutrons (n) in an atom? What is the mass number of the isotope lithium-7? How do you find the mass and fractional abundance of an isotope? Bromine has two naturally occurring isotopes (Br-79 and Br-81) and an atomic mass of 79.904 amu. a. If...
How many protons does iron have? Protons Atoms are made up of three subatomic particles: protons, neutrons, and electrons. Protons and neutrons are much larger than electrons, and they can be found in the nucleus of the atom. Protons are the particle with a positive charge. ...
What 3 things is an atom made of? 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. Other subatomic particles may be fou...
Physicists came up with the idea of strange matter in the 1970s when they wondered what would happen if protons and neutrons were squished superhumanly hard [source: Freedman]. Let's repeat a similar version of their theoretical experiment, imagining we have an iron atom, plus a ...
It's not that simple though. An atom's properties can change considerably based on how many of each particle it has. If you change the number of protons, you wind up with a different element altogether. If you alter the number of neutrons in an atom, you wind up with an isotope. For...
Everything we do is controlled and enabled by electrical signals running through our bodies. As we learned in intro physics, everything is made up ofatoms, and atoms are made up of protons, neutrons and electrons. Protonshave a positive charge,neutronshave a neutral charge, andelectronshave a...
These particles, made up of protons and neutrons, are large and can only travel a short distance -- in fact, they can be stopped with just a piece of paper or even your skin. However, inhalation or ingestion of alpha particles can be very dangerous. Once inside your body, alpha ...
example,carbon atomsalways have six protons;hydrogen atomsalways have one; andoxygen atomsalways have eight. Different versions of the same element, called isotopes, can have a different number of neutrons. Elements can also gain or lose electrons to become charged, in which case they are called...