Electronic affinity increases as you move up a group, because going up a group there are fewer energy levels that stand between the postively charged nucleus and the outer level electrons. This doesn't really come into play as much as the trend moving across periods though. Electron affinity goes up left to right across a period, because as you approach the non-metals, the desire for atoms to gain electrons to satisfy the octet rule/achieve noble gas configuration goes up. By the time you reach the halogens (group 17), that affinity is very high, which makes the halogens the most reactive non-metals.
The number of electrons in the atom increase from left to right and then from top to bottom.
The group 18 elements (noble gases) have the same number of valence electrons from top to bottom in the periodic table.
As you move from left to right across a period in the periodic table, the atomic number increases. This increase in atomic number corresponds to an increase in the number of protons in the nucleus of the atom.
The atomic radius increases down a column in the periodic table because as you move from top to bottom, each element has an additional energy level or shell of electrons. This increase in electron shells results in a larger average distance between the nucleus and the outermost electrons, leading to a larger atomic radius.
You use a Periodic Table to find the group, period, and the material of the 115 elements. You can find the the number of protons/electrons on the bottom of the symbols(which is arranged in oder). You can the mass number on the VERY bottom of the element's block. You can find out the number of neutrons by subtracting the number of protons/electrons from the mass number.
The number of electrons in the atom increase from left to right and then from top to bottom.
The group 18 elements (noble gases) have the same number of valence electrons from top to bottom in the periodic table.
there are more electrons in the elements on the bottom of the table.
As you move from left to right across a period in the periodic table, the atomic number increases. This increase in atomic number corresponds to an increase in the number of protons in the nucleus of the atom.
The atomic radius increases down a column in the periodic table because as you move from top to bottom, each element has an additional energy level or shell of electrons. This increase in electron shells results in a larger average distance between the nucleus and the outermost electrons, leading to a larger atomic radius.
You use a Periodic Table to find the group, period, and the material of the 115 elements. You can find the the number of protons/electrons on the bottom of the symbols(which is arranged in oder). You can the mass number on the VERY bottom of the element's block. You can find out the number of neutrons by subtracting the number of protons/electrons from the mass number.
The number of valence electrons remains the same
The atomic size increase from top to bottom of periodic table. As the number of shells increases from top to bottom, the atomic size increases.
The atomic size increase from top to bottom of Periodic Table. As the number of shells increases from top to bottom, the atomic size increases.
As you move from left to right across the periodic table, the number of valence electrons increases by one at a time. This increase results in a higher effective nuclear charge, which leads to increased attraction between the nucleus and the electrons. This can affect the reactivity and chemical properties of the elements in that period.
When reading the periodic table top to bottom, the number of electron energy levels increase. This is because each row in the periodic table corresponds to one electron energy level. The number of energy level corresponds to the period number of the element.
Periodic table lists the elements in the increasing order of atomic number. Atomic number = Number of protons = Number of electrons