What element has 81 protons? What element has 6 protons? What element has a small atomic radius? Which element has the smallest ionization energy? What is the most massive chemical element? What element with a mass number of 100 has 56 neutrons in its nucleus?
What element has 13 electrons? If a neutral atom loses an electron what is formed? What is the net charge of an atom? What is the ground-state electron configuration of a neutral atom of nickel? What is a metallic atom? What element has 6 protons, 8 neutrons, and six electrons?
To complicate things a bit more, we sometimes find atoms of a chemical element that are a bit different to what we expect. Take carbon, for example. The ordinary carbon we find in the world around us is sometimes called carbon-12. It has six protons, six electrons, and six neutrons, ...
Elements in the same group have the same number of what? A. Protons B. Neutrons C. Electrons D. Valence E. lectrons 相关知识点: 试题来源: 解析 D。原因:“Elements in the same group have the same number of valence electrons.”。 反馈 收藏 ...
百度试题 结果1 题目6 An atom of element Q contains 19 electrons, 19 protons and 20 neutrons.What is Q? B A calcium B potassium C strontium D yttrium 相关知识点: 试题来源: 解析 B 反馈 收藏
Atoms: Atoms are the purest form of matter. They consist of protons, neutrons, and electrons. The periodic table lists all of the different types of atoms that are known to exist and are known as elements. Answer and Explanation: An atom that has more protons than electrons is called a ...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
aThe element X has three isotopes: X-221, X-220, and X-218, with masses 220.9, 220.0, and 218.1 amu. The relative abundances of these three isotopes are 74.22%, 12.78%, and 13.00%, respectively. Calculate the atomic mass of element X. 元素x有三同位素: X-221, X-220和X-218,与大量...
Table. For example, carbon has six protons and is atomic number 6. Carbon occurs naturally in three isotopes: carbon 12, which has 6 neutrons (plus 6 protons equals 12), carbon 13, which has 7 neutrons, and carbon 14, which has 8 neutrons. Every element has its own number of isotopes...
Atoms consist of three types of subatomic particle: protons, neutrons and electrons. The identity of an atom is determined by its proton number or atomic number. For example, any atom having 6 protons is classed as carbon. Atoms are neutral entities, so they always have equal numbers of posi...