Moving across the periodic table to the right, you will next come to helium (He). It has two protons in its nucleus, and thus it has an atomic number of 2. 周期表从左到右,接下来你将看到氦元素。氦原子核中有两个质子,氦的元素序数也是2. The next row begins with lithium (Li), atomic...
Compare the number of electrons and the number of protons. An ion with more electrons than protons is an anion. An ion with fewer electrons than protons is a cation. To determine if an ion is a cation or an anion by looking at the symbol, check the charge of the ion written on the...
The periodic table, also called the periodic table of elements, is an organized arrangement of the 118 known chemical elements. The chemical elements are arranged from left to right and top to bottom in order of increasing atomic number, or the number of protons in anatom's nucleus, which ge...
However, for example, silver can form an ion with +1 charge, whereas zinc and cadmium can gain a +2 charge. To find out whether an atom in these groups form ions more generally and determine their charges, the best thing to do is directly look up the element you're interested in. R...
The periodic table of elements includes 118 individual types of atoms (that is, elements), all of which have a unique number of protons and electrons and a similar number of neutrons. But just how tiny is this infinitesimally small entity? Is there a way to relate thesize of an atomto ...
Use the periodic table to determine the electron configuration for tin. Explain how to write out condensed electron configurations. Include an example. What is the expected electron configuration for the element Cs? Determine the atom based on the electron configuration [Ar]4s^2 3d^5 4p^1. ...
How to Make a Bohr Model Bohr Diagrams 1. Find the element on the periodic table. 2. Determine the number of electrons- it is the same as the atomic number. 3. This is how many electrons you will draw. Find out which period (row) your element is in. Elements in the 1st period ha...
Bohr Diagrams Find your element on the periodic table. Determine the number of electrons – it is the same as the atomic number. This is how many electrons you will draw. Bohr Diagrams Draw a nucleus with the element symbol inside—the symbol represents the protons and neutrons for that atom...
Aluminum's lucky number is 13, so an aluminum atom has 13 protons. It also has 13 electrons. The elements located above and below aluminum on the periodic table form a family, or group, that shares similar properties. Aluminum belongs to group 13, which also includes boron (B), gallium ...
Look at a periodic table to determine the number of protons, neutrons and electrons in the atom that you wish to model. The bigger number on the periodic table for a particular atom is called the atomic mass and is equal to the sum of the number of protons and neutrons. The smaller num...