Atoms, the basic building blocks of matter, are made of three basic components: protons, neutrons and electrons. The protons and neutrons cluster together to form the nucleus, the central part of the atom, and the electrons orbit about the nucleus. Protons and electrons both carry an ...
A. Protons, neutrons and electrons B. Molecules and compounds C. Gases and liquids D. Solids and plasmas 相关知识点: 试题来源: 解析 A。解析:原子理论解释了物质的本质,原子由质子、中子和电子组成。分子和化合物、气体和液体、固体和等离子体都不是原子的组成部分。本题考查对原子理论的熟悉程度和词...
Most atoms have three different subatomic particles inside them: protons, neutrons, and electrons. The protons and neutrons are packed together into the center of the atom (which is called the nucleus) and the electrons, which are very much smaller, whizz around the outside. When people draw ...
When atoms come together, they share electrons in their outer shells to form chemical bonds. This model of a carbon atom is split in half to show the inside. The nucleus of a carbon atom contains six neutrons and six protons. Six electrons orbit the nucleus in two shells. MOLECULES ...
For example, an atom of lithium, atomic number 3, contains three protons and three electrons. 如,锂原子的序数为3,包含3个质子和3个电子。 Figure 4.15 In the periodic table, each element is represented by its chemical name, atomic number, chemical symbol, and average atomic mass.在元素周期表...
Atoms and Their Atomic NumbersAll atoms have different numbers of protons,neutrons,and electrons.The protonsare positively charged and are in the nucleus.Neutrons are also in the nucleus.Butthey have no charge.And electrons orbit the nucleus.They have negative charges.The number of protons and ...
View Solution A substance 'X' having low melting point, does not conduct electricity in both solid and liquid state. 'X' can be : View Solution Identify the following substance : A gas which does not conduct electricity in the liquid state but conducts electricity when dissolved in water. ...
The latter would hold electrons on their proper position. These fundamental aspects of our project receive such strong support from the quantum theory, according to which it is the electromagnetic interaction between electrons and protons by the exchange of photons, which hold them together in the ...
5 (a)Atoms and ions of elements are made up from the three subatomic particles, protons, electrons and neutrons, in varying amounts.Complete the following table to show the number of each particle in 14C2-.protons electrons neutrons14C2-[2] 相关知识点: 试题来源: 解析 6;8;8 反馈 ...
-experimental and theoretical atomic, molecular, and nuclear physics, chemical physics -the study of atoms, molecules, nuclei and their interactions and constituents (protons, neutrons, and electrons) -quantum theory, applications and foundations -microparticles, clusters -exotic systems (muons, quarks,...