The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that ofa___ atom. This is essentially equal to the number of protons plus neutrons that the atom or molecule contains. A oxygen B hydrogen C helium D carbon 相关知识点: 试题来源: 解析 B ...
An atom has a mass number of 24 and 13 neutrons. what is the atomic number of this atom? An atom has a mass number of 25 and 13 neutrons. what is the atomic number of this atom? An atom has an atomic number of 12 and a mass number of 25. how many neutrons does t...
刷刷题APP(shuashuati.com)是专业的大学生刷题搜题拍题答疑工具,刷刷题提供The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that of a(n) ___ atom. This is essentially equal to the number of protons plus neutro
31. In every atom in its normal state, the number of protons equals the number of electrons, something which is directly related to the electrical properties of the proton and the electron. 相关知识点: 试题来源: 解析 【答案】在每个原子的正常状态下,质子的数量等于电子的数量,这与质子和 电...
The graph shows a decrease in atomic radii of period 3 elements across the period. ·Across the period,the atomic radii decrease .This is because the number of protons (the nuclear charge) and the number of electrons increases by one every time you go an element to the right. ...
If the number of (b) ___ changes, the atom is of a different element. Atomic Structure: Atoms, the tiny particles that make up elements and combine to form functional molecules, are composed of three particles. Protons have a ...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
Each element in theperiodic tableconsists of atoms, and each atom has a unique atomic mass and unique atomic number. The atomic number refers to the number of protons in the atom's nucleus, while atomic mass reflects the sum of the number of protons and neutrons. It is expressed in AMU ...
Young people tend to give up when the problem is beyond their ability to cope with.Superficially, it seems to be somewhat reasonable, butwhen weighing in the mind, we find there is an apparent tendency underlying this phenomenon:the lack of confidence.Firstly, it is well-known that we exist...
They then use the average atomic mass to convert this mass into the number of atoms. What types of atoms are most common in the universe? The most common type of atom in the universe is hydrogen, making up about 74% of the universe's elemental mass. Helium is the second most common,...