UC知道英文化学题(+100分）
来源：百度知道 编辑：UC知道 时间：2024/05/31 01:51:07
2： Are atoms positive, negative, or neutral in charge? Explain
3：If an element's atomic mass and atomic number are known, what else can be determined? Give an example to demonstrate your understanding.
Give an example of an atom that will give up its outermost electron easily. Explain why you chose this atom.
1.A homogeneous mixture is a mixture in which all particles are uniformly distributed. heterogeneous mixtures is a mixture in which all particles are not uniformly distributed. NaCl fits into the homogeneous group because on the microscopic level (i.e.: looking at salt at the crystal structure level), we see that the arrange is uniform, that is, it repeats in a pattern in an infinite direction. At the macroscopic level (i.e.: using the naked eye), just having a bowl of salt on the table, you can see that the salt is the same throughout the bowl, that is, it is uniform.
2. atoms has neutral charge because atoms has the same amount of protons (positive charge) and electrons (negative charge).The positive and negative charges therefore cancel each other out perfectly.
3.Numbers of neutrons.because the Atomic mass is determined by the Atomic number plus the number of neutrons.
A= Z + N, where N is the number of neutrons
where A is the