Neutrons and protons are bound together in the nucleus of an atom.
在一个原子的核内，中子和质子聚合在一起。
So let's take two cases of shielding if we're talking about, for example, the helium, a helium nucleus or a helium atom.
所以我们来对屏蔽举两个例子，如果我们在讨论氦，举例来说一个氦原子核或者氦原子。
The atom at the tip of the chain emitted electrons onto a surrounding phosphor screen, rendering an image of the electron cloud around the nucleus.
碳链末端的原子发射电子到周围的磷光屏，得到原子核周围电子云的图像。
As such, it governs-among other things-the energy levels of an atom formed from negatively charged electrons and a positive nucleus.
就此而论，它控制由带负电荷的电子与正电荷原子核的形成的原子能级。
Further, the nucleus is assumed to be the seat of the essential part of the mass of the atom, and to have linear dimensions exceedingly small compared with the linear dimensions of the whole atom.
进一步的，核被认为是，原子主要质量所在的地方，和整个原子线性尺度相比，核具有很好的线性尺度。
Instead, the researchers stored data in the longer-lived nucleus of an atom. D.r..
此次研究是由美国犹他大学发起的，研究人员尝试在寿命相对较长的原子核里存储数据。
A deuterium atom is a hydrogen with an extra neutron in its nucleus.
重氢是原子核中多一个中子的氢。
We're going to be looking at the solutions to the Schrodinger equation for a hydrogen atom, and specifically we'll be looking at the binding energy of the electron to the nucleus.
我们将研究下氢原子薛定谔方程的解，特别是电子和核子的结合能，我们将研究这部分。
This is partly explained because the bigger an atom is, the more weakly its outer electrons are bound to it (and hence the further those electrons are from the nucleus).
原子越大，其外层电子受原子束缚力越弱，这是解释铅和锡两者差别的一部分原因。
And what is discussed is that for a 1 s hydrogen atom, that falls at an a nought distance away from the nucleus.
我们讨论了对于氢原子1s轨道，它的最可能半径在距离原子核a 0处。
The radius of the nucleus as compared to the radius of the entire atom is on the order of about one to 10,000.
原子核的半径，相对于整个原子的半径来说，是1比10000这个数量级。
Deuteron: the nucleus of a deuterium atom consisting of a proton and a neutron regarded as a subatomic particle with unit positive charge.
氘核：氘原子的原子核，由一个质子和一个中子组成，被视为带单位正电荷的亚原子。
Scientists know that a neutron is loose only when the neutron hits the nucleus of an atom. The collision changes the path of the nucleus.
科学家们知道：只有在中子撞击原子的原子核时，中子才可能处于游离状态。这种碰撞会改变原子核的运动轨迹。
So in hydrogen atom a, I'll depict that here where the nucleus is this dot, and then the circle is what I'm depicting as the wave function.
在氢原子A里，我在这里把原子核画成一个点，这圆就是波函数。
These names come from the fact that the source of energy is the nucleus, or core, of the atom.
这个名称来自于原子能来源于核、或者原子核这样的事实。
Quarks, which we also cannot see, are a model to explain the properties of the protons and neutrons in the nucleus of an atom.
夸克同样看不到，但它却是解释原子核中质子、中子性质的理论模型。
An atom contains a tiny heavy nucleus.
一个原子含有一个微小而重的核。
Enlarge an atom to the size of the earth. The nucleus in it would be only about as big as a basket ball.
假如把一个原子放大到地球那么大，他的核子也只不过一个篮球那么大。
So even if we strip an atom of all of its electrons, we still have that same amount of positive charge in the nucleus.
所以即使把一个原子的所有电子都拿走，原子核还是带那么多的正电。
By introducing "the effective nucleus charge number for the potential", the physical features of argon atom field have been discussed.
通过引入“对势函数的有效核电荷”，讨论了氩原子场的物理特征。
The nucleus of an atom can also be split, only its binding force is stronger.
原子核也是可以分割的，不过结合得比较牢固。
A nucleus is about one billionth the size of an atom.
原子核的体积大约是原子的一万亿分之一。
The nucleus of the atom is heaviest structure, and it occupies only a fraction of the volume of the atom.
原子核是最重的结构，而它仅仅占据原子体积的一小部分。
If the whole atom were the size of this theater, its nucleus would be like a speck of dist. Yet the nucleus contains almost all of the atom 's mass.
如果把整个原子的尺寸看成电影院大小，它的核则如同一粒灰尘大小，然而原子的质量几乎全部集中在原子核。
This is partly explained because the bigger an atom is, the more weakly its outer electrons are bound to it and hence the further those electrons are from the nucleus.
原子越大，其外层电子受原子束缚力越弱，这是解释铅和锡两者差别的一部分原因。
An atom consists of a nucleus around which electrons move.
原子有一个原子核，外面有电子围绕它旋转。
What I just spent many lectures discussing is the fact that we can not know how far away an electron is from the nucleus, so we can't actually know the radius of a certain atom.
我花了这么多课时所讨论的正是我们，不可能知道电子离原子核有多远这一事实，因此我们不可能知道某个原子的半径。
What I just spent many lectures discussing is the fact that we can not know how far away an electron is from the nucleus, so we can't actually know the radius of a certain atom.
我花了这么多课时所讨论的正是我们，不可能知道电子离原子核有多远这一事实，因此我们不可能知道某个原子的半径。
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