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They change because the atomic number and mass differ from each other element.
Going across the Periodic Table to the right, the atoms get smaller because another proton is added each time so the effective nuclear charge experienced by the electrons is greater and the electrons are pulled closer to the nucleus. Electronegativity increases as you progress across a period because smaller atoms are usually more likely to gain an electron. Ionization energy increases across a period because the atoms are smaller, pulled closer to the nucleus, so it takes more energy to break an electron away.
What else can I help you with?
What happens to the properties of elements across any periodic of the table?
Across any period, the properties of elements gradually change. This gradual change is called a periodic trend.
Do element properties change as you move across a period or whithin a group?
Yes, element properties change as you move across a period due to the increasing number of protons in the nucleus and the change in electron configuration. Within a group, elements have similar properties because they have the same number of valence electrons, which determine their reactivity.
What is the significance of the horizontal in the periodic table?
Physical and chemical properties change somewhat regularly across a period. Elements that are close to each other in the same period tend to be more similar than elements that are father apart.
What is true about the properties of the elements in any one period of the Periodic Table?
All of the elements in any one period of the Periodic Table have the same number of valence electrons.
Does a period contain elements that are similar?
no. A period is a row of elements in the periodic table whose properties change gradually and predictably.
Why do the properties of elements of change in a regular way across a period?
Because certain groups have different characteristics, so when you move to a different group the characteristics will be different.
How do the metallic properties of the elements change as you move from left to right on the periodic table?
Metallic character decreases as we move across a period. The electronegative character increases as we move across a period. So the element across the period will be non mettalic in nature.
How does the numbers of electrons change across a period of elements?
The number of valence electrons for the elements increases across a period, from 1 (group 1) to 8 (group 18).
How the properties and classification of elements change as you move across period of the periodic table?
As you move across a period of the periodic table from left to right, the properties of elements change because the number of protons and electrons increase. This leads to a decrease in atomic radius, an increase in electronegativity, and a shift from metallic to non-metallic properties. Elements are classified as metals, metalloids, or non-metals based on their physical and chemical properties.
As you move across a period elements have the same number of?
As you move across a period, elements have the same number of electron shells but different numbers of valence electrons. This leads to differences in reactivity and chemical properties across the period.
What do vertical colums represent in the periodic table?
Physical and chemical properties change somewhat regularly across a period. Elements that are close to each other in the same period tend to be more similar than elements that are father apart.
How do physical properties differ as you move across a period or down a group?
Moving down a group, the elements will have the same number if valence electrons. Tis will give them similar properties, such as the Noble Gases, or the extreme reactivity of Group I metals. Moving across a period, elements will begin to resemble each other less and share fewer properties the further apart they are in the row.
