The atomic number is equal to the number of protons in an atom. The number of protons is the definitive feature of an element and all atoms of the same element have the same number of protons. Answer and Explanation: Learn more about this topic: ...
(ii)An explanation that makes reference to the following points: H < He: ● He more protons than H / He greater nuclear charge than H (1) ● in helium the outer electron is in the same shell as hydrogen (1)H > Li:● in lithium the outer electron is in a higher energy level /...
Name of element Symbol Atomic number (number of protons) 元素名称元素符号原子序数(质子的数目) jw2019 Astronomers term "metals" those elements with higher atomic numbers than helium. 天文学家把原子量比氦更大的元素称为“金属”。 LASER-wikipedia2 The atomic number of zinc is 30. 鋅的...
An element's atomic number directly correlates to the number of protons located in the nucleus of its atoms. In fact, the number of protons in the nucleus is the defining characteristic by which an atom is assigned its element. Answer and Explanation: ...
Protons, neutrons, and electrons are found in all atoms except the common form of hydrogen. The number of protons in an element’s nucleus determines its atomic number. The number of protons in a neutral atom is equal to the number of electrons in shells, which is the energy level around...
number of protons in the nucleus of each atom. What is the atomic number of this helium atom? A neutral atom must have equal numbers of protons and electrons, so the atomic number of an element also gives the number of electrons.
The atomic number of an element is defined as the number of protons in the nucleus of one atom of that element. This element is represented by the chemical symbol Xe. Xenon is found naturally occurring in the atmosphere, but only in very small amounts (i.e., less than 0.00001% of the...
The main building blocks of atomic nuclei are protons and neutrons, and it is convenient to describe the composition of an atom in terms of the number of protons and neutrons present in its nucleus. The number of protons contained in the nucleus of an atom is called the atomic number ( Z...
Protons and neutrons make up the nucleus and electrons orbit them in a cloud.Answer and Explanation: The mass number is not the number of protons. The mass number is the number of protons added to the number of neutrons. The mass number can be found......
It's easy to get a hydrogen atom with one proton and one neutron (deuterium), yet you won't find a helium atom with an atomic weight of 2 because this would mean the helium atom had two protons and zero neutrons! If the atomic weight is 4.001, you can be confident the atom is hel...